
Looking to choose the right backpack for overnight hikes or treks? I’m here to guide you with my 10+ years of backpacking experience in all kinds of terrain, including climbing ascents and glacier travel.
You wear your backpack for hours and it is heavy, so it has to be a good fit for your body. Trekking with the wrong backpack could ruin your outing. This is a rather lengthy treatise about choosing exactly the right pack, but we think it’s worth our time and yours; your back and neck are worth it.
We’ll stick mainly to Osprey packs, which I use myself and are the most widely recommended brand (more on why below), but I will also mention a few other, cheaper options.
If you’re looking instead for a smaller pack for a mere day-long outing, check instead our in-depth analysis on choosing between Osprey daypacks.
- Osprey Trekking Backpacks: Quick Side-by-Side Comparison of the Best Series
- Overall Pros and Cons of the Osprey Brand for Trekking
- Women's vs. Men's Osprey Backpacks: What's the Difference?
- How to Measure Your Torso for Osprey Backpack Sizes
- How to Pack your Osprey Backpack for Outdoor Trips
- How to Choose the Volume of Your Backpack
- The Top Backpacks for Regular Weekend Adventures
- The Top Lightweight Osprey Backpacks
- The Best Osprey Backpacks for Longer Expeditions: Aether Plus 70L (Men) / Ariel 65L (Women)
- Wrap-up: And the Very Best Backpack for Your Outdoor Adventure Is...
Update History of This Article
Osprey Trekking Backpacks: Quick Side-by-Side Comparison of the Best Series

Click on the cute little green plus sign for more details on each series.
Osprey pack series | In a nutshell | Features | Designed to carry weight of | Materials | Dimensions and weight | Compatibility | Warranty |
---|---|---|---|---|---|---|---|
![]() Kestrel/Kyte | For a lightweight series, these packs have excellent suspension. An expert minimalist might use the 48/46L or even the 38/36L versions of these backpacks on alpine ascents filled with camping gear, climbing/glacier rack, warm layers, and food. But for most, these may be better for just an overnight trek. Men's versions: Kestrel 68, Kestrel 58, Kestrel 48, Kestrel 38 Women's versions: Kyte 66, Kyte 46, Kyte 36 | All bags in this series feature: • AirScape backpanel with adjustable harness • Top lid with external zippered pocket and under lid zippered mesh pocket • Dual ice tool attachments • External reservoir sleeve (allows easy loading/unloading) • Dual upper reverse StraightJacket side compression straps (provides added stability) • Dual lower side compression straps • Zippered sleeping bag compartment with floating divider • Removable sleeping pad straps • Stow-on-the-Go trekking pole attachment • Front panel hybrid shove-it pocket • Dual stretch mesh side pockets • Zippered hipbelt pockets • Dual front panel daisy chains • Integrated removable raincover • On Kestrel 48: Side zipper access to main compartment, full-length vertical zippered side pocket • On Kestrel 68, 58: Floating top lid, large front panel U-zip access to main compartment | Kestrel 68: 14-20 kg Kestrel 58: 14-20 kg Kestrel 48: 9-16 kg Kestrel 38: 9-16 kg Kyte 66: 14-18 kg Kyte 46: 9-16 kg Kyte 36: 9-16 kg | Main: 210D x 630D Nylon Dobby Accent: 420HD Nylon Oxford Bottom: 500D Nylon Packcloth | Kestrel 68: 68L volume , dimensions 78H x 37W x 37D cm, weight 1.78 kg Kestrel 58: 58L volume , dimensions 78H x 36W x 35D cm, weight 1.76 kg Kestrel 48: 48L volume , dimensions 75H x 34.0W x 32D cm, weight 1.63 kg Kestrel 38: 38L volume , dimensions 75H x 31.0W x 29D cm, weight 1.54 kg Kyte 66: 66L volume , dimensions 73H x 36W x 37D cm, weight 1.76 kg Kyte 46: 46L volume , dimensions 70H x 34.0W x 32D cm, weight 1.54 kg Kyte 36: 36L volume , dimensions 70H x 33.0W x 30D cm, weight 1.47 kg | Can clip on Daylite daypacks | Excellent lifetime warranty; Osprey has a good history of follow-through |
![]() Stratos/Sirrus | These packs are strong, comfortable, and ready for wet weather with built-in rain covers. Available in small to medium sizes so you'll avoid overpacking. They breathe efficiency and have excellent ventilation on the back panel. Men's versions: Stratos 24, Stratos 34, Stratos 36, Stratos 44 Women's versions: Sirrus 24, Sirrus 36 | All bags in this series feature: • Dual side compression straps • Top loading (Stratos 36, 50; Sirrus 36, 50) • Panel loading (Stratos 24, 34; Sirrus 24) • Side mesh pockets • Front panel storage pocket • Ice tool loop with bungee tie-off • Zippered hip belt pockets • Internal hydration reservoir sleeve • Trekking pole attachment • On Stratus 50 & Sirrus 50 only: Removable top lid with zippered slash pocket, front panel slash pocket with dual zippers, zippered sleeping bag compartment, removable sleeping pad straps • On Stratus 36 & Sirrus 36 only: Zippered pocket under fixed lid and exterior slash pocket on lid, front panel vertical zippered pocket, zippered sleeping bag pocket, removable sleeping pad straps • On Stratus 34 only: Front panel vertical zippered pocket, zippered sleeping bag pocket, removable sleeping pad straps, front zippered slash pocket, top zippered slash pocket • On Stratus 24 & Sirrus 24 only: Front panel vertical zippered pocket, front zippered slash pocket, top zippered slash pocket | Stratos 24: 5-12 kg Stratos 34: 7-14 kg Stratos 36: 7-14 kg Stratos 50: 10-18 kg Sirrus 24: 5-12 kg Sirrus 36: 7-14 kg Sirrus 50: 10-18 kg | On Stratos 50 ans Sirrus 50 only Main: 210D Nylon Crosshatch Accent: 420HD Nylon Packcloth Bottom: 420HD Nylon Packcloth On Stratos 24, 34, 36 and Sirrus 24, 36 only Main: bluesign® approved 210D recycled honey comb nylon, PFC/PFAS-free DWR Accent: bluesign® approved 420D recycled nylon, PFC/PFAS-free DWR Bottom: bluesign® approved 420D recycled nylon, PFC/PFAS-free DWR | Stratos 24: volume 24L, dimensions 59H X 34W X 24D cm, weight 1.26 kg Stratos 34: volume 34L, dimensions 60H X 36W X 27D cm, weight 1.43 kg Stratos 36: volume 36L, dimensions 71H X 37W X 27D cm, weight 1.49 kg Stratos 50: volume 47L, dimensions 65H X 36W X 38D cm, weight 1.61 kg Sirrus 24: volume 24L, dimensions 55H X 34W X 24D cm, weight 1.24 kg Sirrus 36: volume 36L, dimensions 68H X 37W X 27D cm, weight 1.43 kg Sirrus 50: volume 50L, dimensions 68H x 32W x 35D cm, weight 1.63 kg | Can clip on Daylite daypacks | Excellent lifetime warranty; Osprey has a good history of follow-through |
![]() Atmos AG/Aura AG | These classic series are some of the most versatile backpacks around — and the 65L versions are the sweet spot for most people. They work for one- to several-night treks, desert, forest, and winter adventures; and more technical ascents (though we’d personally avoid such larger packs if climbing or scrambling). They offer appealing comfort with all of the features people expect from packs in their price range. Men's versions: Atmos AG 65 Women's versions: Aura AG 65, Aura AG 50 | All bags in this series feature: • Anti-gravity suspension • Floating (removable) top lid with web-attachment points • Stow-on-the-Go trekking pole attachment (quickly attach and carry trekking poles while wearing a pack) • Dual access stretch mesh side pockets (store smaller items and provide access when wearing the pack) • Dual zippered top lid pockets • Dual ice tool loops with bungee tie-offs (provide secure tool attachment) • Front stretch mesh pocket for stashing gear (stores gear you need quick access to, or holds wet gear to dry) • Removable sleeping pad straps • Lower zippered sleeping bag compartment with removable divider • Dual upper and lower side compression straps • Sternum strap with integrated safety whistle • Dual zippered hipbelt pockets (keep food and small items close at hand) • Integrated FlapJacket cover for lidless use • Internal hydration reservoir sleeve • On Atmos AG 65; Aura AG 65: Two zippered front pockets provide additional organization options | Atmos 65: 14-18 kg Atmos 50: 11-16 kg Aura 65: 14-18 kg Aura 50: 11-16 kg | Main: bluesign® approved recycled 210D honey comb nylon, PFC/PFAS-free DWR Accent: bluesign® approved recycled 210D high tenacity nylon, PFC/PFAS-free DWR Bottom: bluesign® approved recycled 210D high tenacity nylon, PFC/PFAS-free DWR | Atmos 65: 68L volume , dimensions 88H X 39W X 36D cm, weight 2.18 kg Atmos 50: 53L volume , dimensions 6H X 38W X 31D cm, weight 2.05 kg Aura 65: 65L volume , dimensions 82H X 39W X 36D cm, weight 2.09 kg Aura 50: 50L volume , dimensions 80H X 38W X 31D cm, weight 1.9 kg | Can clip on Daylite daypacks | Excellent lifetime warranty; Osprey has a good history of follow-through |
![]() Talon/Tempest | Carry a more manageable (smaller) load with these packs. They’re light, affordable, and still come with small frames. You can even use them as daypacks if you want. Men's versions: Talon 11, Talon 22, Talon 33, Talon 44 Women's versions: Tempest 20, Tempest 30, Tempest 40 | All bags in this series feature: • Stow-On-The-Go trekking pole attachment • Lower InsideOut compression/carry straps • Side stretch mesh pockets • External hydration sleeve • Stretch mesh harness stash pocket • Two zippered hipbelt pockets • Floating, removable top-lid with zippered stash pocket (Talon 44; Tempest 40) • Fixed top-lid with zippered stash pocket (Talon 33; Tempest 30) •On Talon 44, 33, 22; Tempest 40, 30, 20: Large stretch mesh front panel pocket, harness adjustment, dual and single ice-tool loops •On Talon 22, 11; Tempest 20: Dual zippered panel access to main compartment, top panel zippered stash pocket, lidLock helmet attachment •On Talon 44, 33; Tempest 40, 30: Top loader access to main compartment, zippered sleeping bag access, removable sleeping pad straps, under top-lid zippered mesh pocket | Talon 44: 7-11 kg Talon 33: 5-8 kg Talon 22: 5-8 kg Talon 11: 5-8 kg Tempest 40: 7-11 kg Tempest 30: 5-8 kg Tempest 20: 5-8 kg | Main: bluesign®-approved recycled 100D x 210D wave check high-tenacity nylon, PFC-free DWR Accent: bluesign®-approved recycled 420HD nylon packcloth, PFC-free DWR Bottom: bluesign®-approved recycled 420HD nylon packcloth, PFC-free DWR | Talon 44: 44L volume , dimensions 74H X 31W X 27D cm, weight 1.44 kg Talon 33: 33L volume , dimensions 70H X 28W X 25D cm, weight 1.21 kg Talon 22: 22L volume , dimensions 56H X 25W X 23D cm, weight 1.06 kg Talon 11: 11L volume , dimensions 52H X 27W X 21D cm, weight 0.88 kg Tempest 40: 40L volume , dimensions70H X 34W X 26D cm, weight 1.33 kg Tempest 30: 30L volume , dimensions 66H X 28W X 25D cm, weight 1.19 kg Tempest 20: 20L volume , dimensions 51H X 27W X 23D cm, weight 1.02 kg | Can clip on Daylite daypacks | Excellent lifetime warranty; Osprey has a good history of follow-through |
![]() Exos/Eja | These are Osprey’s signature lightweight backpacks. They offer tremendous suspension and breathability while still having more features than the competition (like attachment points for a variety of gear such as ice tools and hiking poles). These are luxury lightweight! Men's versions: Exos 58, Exos 48, Exos 38 Women's versions: Eja 48, Eja 48, Eja 38 | All bags in this series feature: • Top lid web loop attachment points (can be used to secure additional gear externally) • Removable floating top lid with top- and under-lid zippered pockets • Dual, removable side compression straps (reduce weight) • Stow-on-the-Go trekking pole attachment (designed to quickly attach and carry trekking poles while wearing a pack) • Dual access stretch mesh side pockets with InsideOut compression straps (store smaller items ) • Accessory cord attachment points (provides additional external gear attachment options) • Front stretch mesh pocket for stashing gear • Removable sleeping pad straps • Ice axe attachment with bungee tie-off • Sternum strap with integrated safety whistle • Integrated FlapJacket cover for lidless use • Internal reservoir sleeve | Exos 58: 14-16 kg Exos 48: 11-14 kg Exos 38: 9-11 kg Eja 58: 14-16 kg Eja 48: 11-14 kg Eja 38: 9-11 kg | Main: bluesign® approved recycled 100D high tenacity nylon ripstop, PFC/PFAS-free DWR Accent: bluesign® approved recycled 400D high tenacity nylon, PFC/PFAS-free DWR Bottom: bluesign® approved recycled 100D high tenacity nylon ripstop, PFC/PFAS-free DWR | Exos 58: 61L volume , dimensions 82H X 37W X 33D cm, weight 1.33 kg Exos 48: 48L volume , dimensions 75H X 36W X 30D cm, weight 1.26 kg Exos 38: 38L volume , dimensions 75H X 33W X 30D cm, weight 1.22 kg Eja 58: 58L volume , dimensions 76H X 37W X 33D cm, weight 1.28 kg Eja 48: 48L volume , dimensions 75H X 36W X 30D cm, weight 1.25 kg Eja 38: 38L volume , dimensions 75H X 33W X 30D cm, weight 1.22 kg | Can clip on Daylite daypacks | Excellent lifetime warranty; Osprey has a good history of follow-through |
![]() Aether Plus/Ariel | These workhorse packs allow you to carry heavier loads without sacrificing on comfort. The frames are burlier and the straps are adapted for carrying more weight than the Atmos/Aura. These are ideal for multi-night outings and/or winter adventures where you need more gear. Men's versions: Aether Plus 85, Aether Plus 70, Aether Plus 60 Women's versions: Ariel 65, Ariel 55 | All bags in this series feature: • Removable top lid converts to DayLid daypack • Dual upper side compression straps • Dual access side stretch mesh pockets • Lower Inside-Out compression straps • Zippered hipbelt pockets • Stow-on-the-Go trekking pole attachment • Additional main compartment access • Large stretch mesh front panel pocket • Dual front compression straps with StraightJacket compression • Dual ice tool loops with bungee tie-offs • Zippered sleeping bag compartment with collapsible divider • Removable sleeping pad straps • Integrated FlapJacket cover for lidless use • Internal hydration reservoir sleeve • Large front panel zip access to main compartment | Aether Plus 85: 18-32 kg Aether Plus 70: 14-27 kg Aether Plus 60: 14-27 kg Ariel 65: 14-27 kg Ariel 55: 14-27 kg | For Aether Plus 85, 70, 60 Main: bluesign®-approved 210D high-tenacity nylon, PFC-free DWR Accent: bluesign®-approved 210D high-tenacity nylon honeycomb contrast, PFC-free DWR Bottom: bluesign®-approved 210D high-tenacity nylon, PFC-free DWR> For Ariel 65, 55 Main: bluesign®-approved 420HD nylon packcloth, PFC-free DWR Accent: bluesign®-approved 210D nylon Diamond, PFC-free DWR Bottom: bluesign®-approved 420HD nylon packcloth, PFC-free DWR | Aether Plus 85: 85L volume , dimensions 86H X 41W X 40D cm, weight 2.88 kg Aether Plus 70: 70L volume , dimensions 84H X 38W X 36D cm, weight 2.8 kg Aether Plus 60: 60L volume , dimensions 83H X 37W X 33D cm, weight 2.7 kg Ariel 65: 65L volume , dimensions 80H X 40W X 28D cm, weight 2.22 kg Ariel 55: 55L volume , dimensions 78H X 38W X 25D cm, weight 2.19 kg | Can clip on Daylite daypacks | Excellent lifetime warranty; Osprey has a good history of follow-through |
Overall Pros and Cons of the Osprey Brand for Trekking
There are other good brands out there, but I use and recommend Osprey because they have earned their reputation through years of making excellent trekking-specific backpacks. They have great engineering, useful features, and a diverse range of products to fit everyone’s needs.
FYI: Neither Osprey nor other brands have ever sent this site a dime. We buy our own packs outright, and our too-meager revenue comes from Amazon and other stores, meaning we can recommend any brands we like.
What’s to Love About Osprey Backpacks

Comfort: Osprey backpacks come with a unique suspension technology and padded and ventilated hip belts, shoulder straps, and back panel. If you pack right, it’s guaranteed comfort. I always feel good with my packed Aether AG 70L. Women say they get top comfort as well as Osprey has been making female-specific backpacks for 25 years (more on this below).
Ventilation: Seamless mesh used on the shoulder straps, back panel, and hip belts give Osprey packs excellent ventilation when carrying the appropriate weight. This is a must in the mountains, and adventure racer Ben Clark shows us.
Storage: Accessing gear is easy with most packs reviewed. They have a separate compartment for camp gear that you won’t need during the day. Good hip belt and water bottle pockets make it easy to access snacks or your camera on the go. You will have room for everything you need (as climber Neil Gresham notes) while also achieving a snug fit for your activities.
Materials: The main material is nylon of varying weights and types depending on the model and the part of the bag. The frames are made of aluminium or LightWire, a light and flexible alloy. Osprey uses tough materials, which are a bit heavier, but also ensures that the packs won’t fail in mid-trip. Mine barely has a scratch despite many overnighters and flights. Legendary thru-hiker Andrew Skurka has spoken highly of the Exos/Eja’s durability. And all of the other backpacks I review here are even tougher!
Warranty: Osprey quickly repairs or replaces damaged and defective backpacks (and has an excellent history of actually following-through); there is also good customer service.
Incidentally, we’ve long recommended Osprey carry-on wheeled backpacks for minimalist travel and even larger Osprey wheeled backpacks for much the same reasons; they’ve held up for a variety of us writers at this site over many years of constant travel.
The Drawbacks to Osprey — but They’re Not Weighing Us Down
People into technical sports will find flaws, but Osprey mainly makes packs for backpacking, trekking, and overnight camping. Osprey backpacks don’t have a lot of cons for typical backpackers, but here are some factors to consider.
Cost: Quality and excellence come at a cost. There are cheaper packs, but most of them are of an inferior quality. The backpack is what spreads your heavy load on your body. Getting a good one is a worthwhile investment. Gregory and Deuter also make good backpacks that are sometimes cheaper, depending on the model.
Weight: While they are definitely not the heaviest, Osprey trekking backpacks are not the lightest either. Their material, features, and frame make them great in terms of comfort, but generally average in terms of weight. But I do review two of Osprey’s lightweight options below.
Rain cover: A rain cover is not always included. In those cases, they are available separately, but at the price these bags cost, it’s a feature you might expect to get. An Osprey Ultralight Rain Cover will set you back another $20-40.
Women’s vs. Men’s Osprey Backpacks: What’s the Difference?
Your trekking backpack is a critical piece of equipment you will wear for many hours. When you have so much weight on your back, it’s important to have a backpack that fits your physiology to increase comfort, avoid injuries, and make you want to keep doing the activity.
Most lower-end brands make unisex backpacks. Some are decent and most are attractive pricewise. However, they have limitations in terms of fit at the shoulders, chest, or hips. When you try to fit both women and men, you aim somewhere in the middle and often end up short.
Typically, unisex backpacks tend to fit men better than women. My first trekking backpack was unisex and made by an outdoors retailer’s house brand, MEC. I still use it occasionally for day hikes in winter, but I have never taken it on an overnighter since purchasing my Osprey Aether. The quality simply can’t compare.
Osprey offers a line for men and one for women. Women-specific backpacks are usually narrower and have a smaller frame as women tend to be smaller than men. Shoulder and sternum straps are also contoured with the female upper body in mind. Finally, hip belts are efficient in transferring weight to the sometimes rounder hips.
Of course you can use this information to choose the pack to best match your body type, wherever you fall on the gender spectrum.
How to Measure Your Torso for Osprey Backpack Sizes
Measuring your upper body is important for choosing the right trekking backpack. Each series has different volumes available (40-70L, etc.), but then each of those packs also generally come in different sizes (S, M, L, XL). Getting the right size allows you to adjust the pack better, thus increasing comfort. Here’s what you need to do to get the right measurements:
- Locate the level of your hip bones
- Identify your C7 vertebra (it’s the bone that sticks out at the base of your neck when you bend your head down to your chest)
- Measure the distance between the two
- Use that measure to choose your size

We’ve included the size ranges (there’s a bit of overlap) for each size backpack in each series description below.
How to Pack your Osprey Backpack for Outdoor Trips
- First, fill the bottom compartment. It’s usually advertised as being for the sleeping bag. You can put your sleeping bag in there or anything light and bulky, such as clothes, mittens, gloves, etc. You don’t want something heavy pulling you down.
- Put the rest of your gear in the main compartment, keeping the heavy items close to your back. Make sure to pack carefully as opposed to stuffing everything in.
- Use the compression straps to stabilize your load, removing air or dead space. Your pack will become less bulky and look more like a cylinder. This will be easier for you to wear as the pack will be more stable and the center of gravity closer to all ends.
- When you put the backpack on, clip the hip belt so that it sits just on top of your hip bone and tighten it until you are comfortable. Make sure it’s not rubbing your skin and hurting you. Your hip belt is not a decoration, so use it appropriately.
- The shoulder straps should be tight, but not putting too much weight on the shoulders. Otherwise, you will feel discomfort and risk injury.
- The anchor points of the shoulder straps to the pack should be about two inches below your shoulders. Your sternum straps should be one inch below the collarbone and allow you to move freely.
- Many larger backpacks have load lifters, a small strap linking the top of the back panel and the shoulder strap. Tighten them so the angle between the strap and the top of the back panel is roughly 45 degrees.
In a nutshell, make sure everything feels comfortable before going out. Remember that your hips are strong and should carry a fair share of the weight. When you are on the trails, it’s normal for your straps to loosen. Check your fit every few hours.
How to Choose the Volume of Your Backpack
An important part of choosing your backpack is identifying the right model and volume for your needs. Your options start at 40-45L and go up to over 100L. It’s not always easy to know which one is the right size for your gear, but I will cover a few questions to help you think about it.
What Will I Use the Backpack for?
It sounds obvious, but ask yourself this seriously. Most people don’t have the budget or the space to buy more than one daypack and one trekking backpack. Also, most backpacks are not versatile to the point where they are perfect for hiking in the desert, and winter sports, and urban trips, etc. (though the Atmos/Aura comes close).
If you plan to use the backpack mostly for two-day camping trips for example, your backpack should fit that need. Think of the equipment you will carry and choose a pack that allows you to carry it efficiently. Some backpacks have features that are interesting for camping, but useless if you stay in huts.
What Is My Fitness Level?
Consider the weight you can carry. If you buy a huge backpack, you are likely to fill it, which means it will weigh more. Do you have the fitness level to bring a full 70L backpack on an overnighter in the mountains and still have fun? Lugging a backpack that is too heavy can turn your hike into a death march.
What Equipment Do I Need to Bring?
I went on my first backpack 15 years ago. I was young, in excellent shape, and loved the outdoors. I was an experienced hiker, but only doing daytrips. I planned a 2-day 32-mile loop around a cape with a friend. The elevations were low, but there were many ups and downs.
I had a lot of cooking gear, but when we stopped, I didn’t feel like cooking. I brought my tripod, but I was too tired to take any photos. I had a lot of spare clothes, but didn’t change. By the end of the weekend, I realized I had packed wrong and my heavy pack had destroyed me.
Before choosing your pack, think of the equipment you really need. Only bring things that are absolutely necessary or can double as something else. Your pot can also be your plate, bowl, and cup. Your change of clothes can also be your dry pajamas.
If you buy a 70L backpack, you will likely fill it. You will have space left and will want to bring that extra down jacket or bowl to eat your pasta. If you think well about what you really need, you will buy the right pack, shed a few extra pounds, and have a more enjoyable outing.
Remember: Shedding weight from your backpack means leaving things that are not necessary. Safety gear is always necessary.
Should I Get a Lighter Backpack?
Lighter backpacks are lighter for a reason. They usually have a smaller frame (or none), less padding, and less features. In other words, they are typically less comfortable when loaded and are not the fanciest.
Not an issue? Then go for it. Your load will be lighter and you will likely enjoy your outing more. I use a 40L backpack on overnight alpine ascents. That means I have what I need to camp, a rope, climbing gear, glacier travel equipment, extra clothes, food, and safety items. Yes, it all fits in a 40L pack and usually nothing hangs or dangles from the sides. How do I do it?
It requires smaller and lighter equipment, and only bringing the essentials. You can also split the weight with your friends. If there are three of you, you don’t need three stoves. Think of other items you can share and then stay together on the trail so that you all always have access to everything.
The Top Backpacks for Regular Weekend Adventures
These packs will appeal to the majority of readers. If you do overnight hikes once in a while, sometimes pushing them to two nights, this is the section for you.
Kestrel 48L (Men) / Kyte 46L (Women): Small, Comfortable, Perfect for Trekking to Huts and Lean-Tos

At 48L or 46L, the Kestrel/Kyte are the smallest backpack series in this category. They will appeal to trekkers who don’t need a lot of room, but are also interested in durability and features.
These are of a similar size to the backpacks covered next in the “lightweight” series. One of the main distinguishing features of the Kestrel/Kyte is that they have better back panels and better overall suspension. This means they will perform better with heavier loads.
They also come with AirScape back panel technology, which keeps the weight close while allowing airflow. These features increase the weight of the pack, but this category is about comfort.
These packs are perfect if you have small and light gear, but want the comfort a full frame provides. They are also excellent candidates if you will hike from hut to hut, like in the famous treks of Europe, the Tour du Mont Blanc, Chamonix to Zermatt, or the Camino de Santiago. Their size also makes them good options for backpacks in warm and nice weather even if you don’t have the lightest equipment.

You are ready for wet weather these packs come equipped with rain covers.
The top lid cannot be removed, however. If you hoped to take it off once in a while to reduce weight or use it as a fanny pack for short side trips, the Kestrel/Kyte will not be good fits, and you should consider the Stratos/Sirrius just below.
The Kestrel also comes in 58L and 68L, and the Kyte also comes in 66L. But if you are interested in those sizes, I recommend looking into the Atmos/Aura AG 65L and Aether/Ariel AG 70L described later, as they are superb backpacks.
Torso sizes for the Kestrel (men’s):
- Small/Medium: 16-20 in / 40.5-51 cm
- Medium/Large: 19-23 in / 48-58.5 cm
Torso sizes for the Kyte (women’s):
- Extra-small/Small: 13-17 in / 33-43 cm
- Small/Medium: 16-20 in / 40.5-51 cm
Stratos (Men) / Sirrius (Women) 36L: Smallish, Tough, and Comfortable

The Stratos/Sirrius are perhaps the Kestrel/Kyte’s siblings for wet weather with built-in rain covers.
Like all backpacks featured here, the Stratos/Sirrius offer excellent breathability; they have AirSpeed technology, a mesh net that keeps the pack away from your back. This suspension is strong and allows you to carry a good load without issues. The straps offer excellent padding. These features add a bit of weight to the pack, but you gain comfort.
This Stratos/Sirrius offered sizes are smaller than in the Kestrel/Kyte’s size range.

I would recommend these packs for trekkers who have small and light gear or those who pack light, for example during summer trips when little gear is required. These are also excellent if you are backpacking using huts or lean-tos for sleeping.
And finally if you want to get into mountaineering, these are good options. They’re big enough to carry gear and to still be comfortable for the more technical sections. No one likes to spend much time on technical terrain with a 65-70L on their back.
Torso sizes for the Stratos 36 (men’s):
- O/S: 18-22 in / 46-56 cm
Torso sizes for the Sirrus 36 (women’s):
- O/S: 15-19 in / 38-48 cm
Atmos (Men) / Aura (Women) AG 65L: Osprey’s Versatile Classics

These are perhaps Osprey’s most popular and versatile trekking backpacks. With legendary comfort, excellent breathability, and the brand’s anti-gravity (hence the AG in the name) suspension, the rave reviews are hardly surprising. The AG system is a seamless trampoline-like mesh pad that covers the back panel and the hip belt to distribute the weight and eliminate pressure points.
If you think the two other packs covered above would be too small, or if you like having extra space just in case, consider the Atmos/Aura 65L (also available as a 50L). For one extra pound, you get a backpacking workhorse and 15L of extra space.
The top lid is removable and doubles as a fanny pack. This is perfect for side trips to lakes or to nearby peaks. You can hide your pack along the trail and go light with only a snack, water, and an extra layer of clothing.

The pack’s hip belt is interchangeable and adjustable to ensure maximum comfort. This means that if you need to, you can change the hip belt that comes with the packs for a smaller or bigger one to better accommodate your waist.
The rain cover is not included, which is a bummer.
I recommend these packs for weekend adventures. You can even stretch them to a few nights if you want. Packs of this volume give you a lot of freedom and options, even if your equipment is not the smallest, and that’s why they’re so popular. Out of all the packs I’ve reviewed here, these are the most versatile as trekkers from all levels can use them and have an excellent experience.
The Atmos/Aura are very comfortable, but a bit heavy. They’re also not the best for very heavy loads (45+ pounds). Over that weight, the shoulder straps start moving and the suspension system underperforms. For heavier loads, consider the Aether/Ariel AG below. But for loads under 45 pounds however, the Atmos/Aura AG are the most comfortable options on the market.
Torso sizes for the Atmos (men’s):
- Small/Medium: 17-20.5 in / 43-52 cm
- Large/XL: 19.5-23 in / 49-58.9 cm
Torso sizes for the Aura (women’s):
- Small/Medium: 13.5-17 in / 34-43 cm
- Large/XL: 16-19.5 in / 40.5-49 cm
Candidates from other brands
- Granite Gear Blaze 60L: It’s lighter and still great for hauling heavy loads.
- Gregory Baltoro 65L: If a pack has better features, this could be it.
The Top Lightweight Osprey Backpacks
If you want to reduce the weight you carry, don’t need a lot of space, and don’t mind simplicity, these packs are for you. They are also excellent for thru-hiking (end-to-end hiking in a single direction).
Talon 44L (Men) / Tempest 40L (Women): The Affordable Lightweight Packs

The Talon/Tempest are good no-frills backpacks for budget-conscious minimalists. When I say no-frills, it’s by Osprey’s standards. They still come with aluminum frames for better suspension and large comfortable padded hip belts and shoulder straps to distribute the weight. They also have loops for an ice axe if you use it. I recommend the 44/40L sizes, as the other volumes are simply too small for backpacking.
If you are looking at these backpacks, you likely already have smaller and lighter gear and are interested in carrying the lightest load possible while still having a frame. I have used a light frameless non-Osprey 40L pack to go on some ascents wished I had a frame.
These packs are top-loading, which is common for lightweight backpacks. They also have hip belt pockets. They don’t have many more features, but if you are considering this pack, you likely don’t care. Features add weight and you want to reduce it. Another good reason to invest in this pack is that its smaller size makes you think carefully about what you bring.

I also like the size because you can easily use this bag for long day hikes or for winter outings, especially if you remove the lid — I do it. Packs of 50L or more are too bulky and uncomfortable for day hikes. The Talon/Tempest are very versatile purchases and they win points in my book.
In a nutshell, if you are a backpacker or thru-hiker looking for a light pack with a frame to increase comfort, these are for you. The next packs, the Exos/Eja, have better suspension and ventilation systems, but they are also more expensive. If those are not critical to you or if your budget is limited, I suggest getting the Talon/Tempest and saving a bit of money for another piece of gear.
Torso sizes for the Talon (men’s):
- Small/Medium: 16-20 in / 41-51 cm
- Medium/Large: 19-23 in / 48-58 cm
Torso sizes for the Tempest (women’s):
- Extra-small/Small: 13-17 in / 33-43 cm
- Small/Medium: 16-20 in / 41-51 cm
Exos (Men) / Eja (Women) 48L: The Luxury Lightweight Packs

I consider the Exos/Eja 48L to be small upgrades from the Talon/Tempest if you have the extra cash. They score extra points because of their comfortable shoulder and hip straps and good frames. The padding is minimal to reduce weight, but sufficient. The shoulder straps are perforated, ensuring great ventilation.
As with all lightweight packs, suspension is an issue with heavier loads due to the smaller frame. If you get this pack, make sure it is not loaded with more than 30-35 pounds for best performance.
With all these features, the Exos/Eja are like luxury models in the universe of lightweight packs, for those who are weight-conscious but unwilling to sacrifice comfort. These packs are perfect for backpacking treks — if your gear fits — and thru hikes. But I wouldn’t bring such a big pack on day hikes, even with the lid off.

In terms of features, the sleeping pad straps are small and foam mattresses might not fit. If that’s your case, you would have to invest in a new pad, cut your current one, or find another way to store it. Also, the Exos/Eja do not have hip belt pockets. I don’t really use them, but that could be a major con for some.
So if you want a light pack with a frame that can carry decent weight and still have good ventilation, these could be for you. Trekking with a lighter backpack is easier and more enjoyable.
If you think you will carry more than 35 pounds often, consider a sturdier option, the Stratos/Sirrius above or Atmos/Aura AG also above, for example. Those are not lightweight options; your back will thank you for using them to increase your comfort if you’re carrying a bit more.
Torso sizes for the Exos (men’s):
- Small/Medium: 17-20.5 in / 43-52 cm
- Large/Extra-large: 19.5-23 in / 49-58.9 cm
Torso sizes for the Eja (women’s):
- Extra-small/Small: 13.5-17 in / 34-43 cm
- Medium/Large: 16-19.5 in / 40.5-49 cm
Candidate from another brand:
- Granite Gear Virga 2 52L: A good weight-to-volume ratio, and cheaper
The Best Osprey Backpacks for Longer Expeditions: Aether Plus 70L (Men) / Ariel 65L (Women)
I recommend the Aether Plus 70L/Ariel 65L to support heavier loads. These packs are a bit heavy, but they haul heavy weight like few others. They also feature an anti-gravity suspension system for increased stability and comfort.
The Aether Plus/Ariel is available in smaller and bigger sizes, but I recommend the 70L/65L. The other sizes are good as well, but if you are interested in a smaller pack, look into the Atmos/Aura AG above instead. And the average backpacker won’t need more than about 70L. If that is not enough, you are bringing too much gear!
I frequently use my AetherPlus on overnight hikes. I often carry over 45 pounds, either my overnight gear plus my climbing or wife’s equipment. I have yet to feel discomfort and the pack always has good breathability. It is also durable and barely has a scratch after having taken some abuse in all seasons.

There is plenty of storage and the organization of the compartments makes it easy to reach practically all your gear without having to go take your pack apart. I’m able to fit all my camp gear in the bottom compartment. There are plenty of loops, pockets, and straps for technical equipment. I use the front mesh pocket for wet equipment I want to dry.
The top lid is removable to reduce weight or use as a small backpack. It is not very comfortable however, so it only works for short side trips. A flap jacket covers the pack when the lid is removed.
Torso sizes for the Aether Plus (men’s):
- Small: 16-19 in / 40.5-48 cm
- Medium: 18-21 in / 46-53 cm
- Large: 20-23 in / 51-58.5 cm
- Extra-large (70L model only): 22-25 in / 56-63.5 cm
Torso sizes for the Ariel (women’s):
- Extra-small: 15-17 in / 38-43 cm
- Small: 16-19 in / 40.5-48 cm
- Medium: 18-21 in / 46-53 cm
- Large (65L model only): 20-22 in / 51-56 cm
Wrap-up: And the Very Best Backpack for Your Outdoor Adventure Is…
The backpack you should get depends mainly on your objectives, the gear you carry, and your needs in terms of features and comfort.
If you target performance, want a very light but comfortable option, and can afford it, get the Osprey Exos 48L for men or Osprey Eja 48L for women.
If you backpack once in a while and want space, features, and comfort get the classic Osprey Atmos AG 65L for men or Osprey Aura AG 65L for women.
If you do long treks or activities that require extra gear, get a reliable workhorse: the Osprey Aether Plus 70L for men or Osprey Ariel 65L for women.
Get a pack that is sized right, allows you to bring everything you truly need, has a little extra room for safety gear — an extra layer for example — and fills up to a weight you are comfortable carrying for your planned distances.
Happy trails!
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