Your Guide
Mose Hayward
Cheapskate Vagabond
We’ve taken the small cabin bag from CabinZero, the Classic 28L, as a personal item that goes under the seat in front of us on flights around Europe, the USA, and Mexico.
CabinZero bags not a full-featured, luggage travel nerd’s dream. They are not something that a backpack reviewer like me would ordinarily choose, because I’ve gotten a bit hooked on fancier features, in spite of the “minimalist” claims of this, my silly website. But the CabinZero Classic 28L is a basic, very well-built bag that is inexpensive and built to hold up for a long time. Those who have purchased it with their own money tell me they very much enjoy it and found it worthwhile.
Here’s our take so that you can decide if the CabinZero Classic 28L is a good underseat cabin bag for you.
A Sturdy and Affordable Underseat Bag: The CabinZero Classic 28L
The CabinZero Classic 28L is the best way we’ve found to not pay much for a bag and maximize what we can carry in as a personal item while flying.
Pros
- Durable 600D polyester fabric on the entire shell, YKK zippers, and solid construction throughout—it’s held up perfectly over multiple trips and we expect it to last for years
- Fits within the personal item / underseat cabin bag restrictions of any airline as long as you don’t overstuff it (see below for details)
- Has important basic features like a 15.6″ laptop sleeve, compression straps (which can convert it to a slimmer daypack), and pockets on the inside and outside of the front flap
- Uncomplicated by extras that would eat into the interior space, add weight, or add cost
- Very reasonably priced for what you get
- Many color options
Cons
- It lacks the elite comfort features of more expensive backpacks: padding on the handles and laptop sleeve, water bottle pockets, a sternum strap to better distribute the load, a ventilated back panel and straps. For such features, you’d need to upgrade (and pay more for) fancier options like these Osprey daypacks.
Our Experience with the CabinZero Classic 28L and its Key Features
There aren’t a lot of surprises in this backpack; it comes as advertised.
The Truth About the CabinZero Classic 28L and Airline Underseat Cabin Bag Restrictions
The main CabinZero marketing point and the founder’s stated reason for starting the company is that the Classic 28L is supposed to meet the confusing restrictions of airlines.
We’ve actually made a table of the underseat cabin bag (or “personal item”) restrictions for the budget airlines to see what is most restrictive and ensure that bags we travel with and recommend always fit.
In a nutshell: You can use the CabinZero Classic 28L (and any similarly flexible fabric backpack) as a cabin bag as long as you don’t overstuff it or have things dangling off the side, so that, if asked to do so, you can fit it in the airline’s luggage sizer. But with a small-looking bag like this one, you will almost never be asked to do so at the gate. We have never had an issue with the CabinZero Classic 28L, including on the most restrictive airlines like RyanAir, United Airlines, and Vueling.
To explain the Cabin Zero bags and airline underseat cabin bag sizes in more detail:
- Each airline sets its own rules about what counts as an underseat cabin bag or personal item or whatever they want to call it. These bags go free; they generally make you pay more for a “full-sized carry-on”, such as a small suitcase with wheels or a larger backpacker trekking pack. The most restrictive airline by most measures is RyanAir, which allows only a 20L cabin bag measuring 40 x 25 x 20 cm. (16 x 10 x 8 in.).
- In spite of the videos and photos in CabinZero’s marketing that show the bag fitting in RyanAir and other airlines’ sizers, the CabinZero Classic 28L is actually slightly larger than the official size restrictions. It’s marketed as measuring 39 x 29.5 x 20 cm. (15.4 x 11.6 x 7.9 in.). With my measuring tape it actually appears slightly smaller than this; I presume they’re counting the handles, which do stick out a bit.
- CabinZero’s bags do not have a rigid structure. As long as you don’t overstuff them, they can squeeze into a sizer, even for RyanAir. And even with RyanAir, it would be pretty difficult to pack it to the point that it doesn’t actually fit.
- Importantly, bags that appear small like this are almost never actually checked.
- Incidentally, I have no idea why they call this CabinZero Classic a “28L” bag. Doing the math with their own measurements, I get 23L. And as I said, to me it measures even a bit smaller, so I don’t think you can fit anywhere close to 28L worth of stuff on the inside. The simplicity of the bag does maximize the interior space, however, while staying within restrictions, which is exactly the point of this bag.
Durability, Construction, and Warranty
The CabinZero Classic 28L’s entire shell is 600D polyester, making it both light and durable. The material is pleasant and gives the impression that it will hold up much longer than lower grades of polyester found on nearly all backpacks in this price range and lower.
There is a water resistant coating and it works well enough to keep the interior dry, but in our tests the bag’s exterior absorbs some water and it will need to be hung to dry for much of the day afterwards after being caught in a downpour. For much better water resistance, we recommend the Osprey Transporter series. CabinZero also offers an outdoorsy Waterproof 30L Backpack.
The zippers—a main failure point in many inexpensive backpacks—are YKK, a signal for good construction generally. The zippers are large and easy to operate and have held up well in our months of road use.
Cabin Zero offers a “lifetime” warranty that refers to the product lifetime, not yours, and says that the end of the product life is considered when the components and materials start to give out, making it unclear what they actually would be willing to repair or replace. But for the price, it’s a very well-built piece and it’s nice to know that it’s covered if any obvious defects are discovered in normal use.
We’ll update this article as we continue to use the backpack and would also love to hear any reader experiences in the comments.
UPDATE SEPTEMBER 2025: After two years of our regular use of this bag in frequent travel, it shows no signs of wear or breakdown. Neat!
Organizational Pockets
On the front flap of the bag there is a zippered pocket that runs the full length of the bag. Unlike many such bags we review, there is no further organization within this front pocket, say, a key ring or internal mesh dividers. The simplicity is part of the point of this bag and could be good for those who want to just dump all their stuff in and not worry about it fitting within specific internal pockets or forgetting which pockets-within-pockets stuff is stashed away in.
The main compartment zips wide open so that you can fold the bag out nearly flat if you want to reveal all of its guts; this is useful for finding stuff without digging around blindly with your hands. (In the photo above the main compartment is not opened all the way up.) Since it’s one big open space, to keep things organized you’d likely want to use packing cubes. We’ve reviewed several and generally prefer the inexpensive-but-high-quality set from Gonex.
The zippers to the main compartment are lockable if you buy a lock, though I don’t quite get this since any determined thief will just cut open or take the bag.
In the photo, you can see a mesh pocket running along the interior of the front flap, which is a great place to carry a passport and other valuables—here they’re more protected than in the outer pocket. Below that there is a non-transparent pocket of a similar size, which could be good for placing things that you don’t want to immediately have visible to prying eyes when opening the bag, such as perhaps your travel lube and other such private accessories for road fun.
Note that we’ve got an umbrella on the inside of the bag in the photo, which is not ideal for accessibility and not possible once it has gotten wet; I prefer to carry an umbrella in one of the two external water bottle pockets on Osprey Daylite Daypacks; it’s a useful feature that’s missing here for CabinZero.
The laptop sleeve is against the back of the main compartment. It’s protected by the padding of the backpack bag, which is something, but there is not a “false bottom” as on many packs that would protect it from an abrupt drop of the entire bag. Nor is their protection between the interior contents and the laptop; the sleeve simply holds the laptop in place. CabinZero says that it can hold up to a 15.6″ laptop (which is a diagonal screen measure, actual laptops vary), but that seems conservative to me. I measured it by holding a tape measure on the insides of the sleeve and it measures 38 x 29 cm (16 x 11.4 in.), so as long as your laptop is smaller than that, you’re fine. Take into account your laptop sleeve though, if using one for protection (recommended for this bag).
Other features
There are four compression straps, two on each side of the CabinZero Classic 28L. These are useful for cinching down the pack if it’s a bit too full, as well as for converting it into a much slimmer pack, for example if you wish to empty out your stuff and use it as a daypack while walking around a new city on a trip. Also, these can be used to hang extra things on the outside of the pack, particularly if you use the travel hook that we recommend (the HeroClip). You might also attach a sweatshirt or raincoat to the outside of the pack with these straps.
On the other hand, these straps can be an extra thing to unbuckle or to have hanging from the bag if left unbuckled.
The shoulder straps are padded and comfortable, as is the back panel, but there is no ventilation on them, a feature that on many packs supposedly keeps you cooler for long periods of carry in hot weather, and probably does help some. There is no sternum strap, which I personally would like to see, as it helps distribute the load. That said you’re probably carrying nothing too heavy in this small bag.
Wrap-Up: Is the CabinZero Classic 28L Right for You?
The simplicity and price are the main points in favor of the CabinZero Classic bags. There’s nothing extra to weigh you down nor to take up the little bit of backpack space that stingy airline requirements allow. They’re also well-built and should last for a long time.
In addition to the CabinZero Classic 28L model that we cover here, there are a range of other options with various sizes, features, and colors, but much of the same aesthetic.
