Cabin Zero Classic Plus Backpack 42L vs REI Co-op Trail 40 Pack - Women's
The Cabin Zero Classic Plus Backpack 42L is 42L and 1.2kg2.6lb; the REI Co-op Trail 40 Pack - Women's is 41L and 1.25kg2.8lb. The Cabin Zero Classic Plus Backpack 42L is 0.05kg0.1lb lighter. The Cabin Zero Classic Plus Backpack 42L costs $18 less. The Cabin Zero Classic Plus Backpack 42L fits the carry-on limit of 35 of 36 major airlines and the REI Co-op Trail 40 Pack - Women's fits 14; under the seat, 0 and 0 of 26.
| Spec | Cabin Zero Classic Plus Backpack 42L | REI Co-op Trail 40 Pack - Women's |
|---|---|---|
| Price | $141Best | $159 |
| Volume | 42L | 41L |
| Weight | 1.2kg2.6lbBest | 1.25kg2.8lb |
| Carry-on compliance | 97%Best | 39% |
| Personal-item compliance | 0% | 0% |
| Dimensions | 54×35×20cm21.5×14×8in | 52×30×24cm20.5×12×9.5in |
| Laptop | 17" | no laptop sleeve |
| Compartments | n/a | 1 |
| Bottle pockets | 1 | 2 |
| Compression straps | 2 | n/a |
| Opening | Clamshell, Full clamshell opening | Panel access, top/panel |
| Warranty | Lifetime | No fixed term |
| Torso length | n/a | 39 to 46cm (15.5 to 18in) |
| Sizes | n/a | XS-S, M-XL, 1X-4X |
| Fit | n/a | Women's |
| Organizer | Yes | No |
| Shoe compartment | No | No |
| Hydration sleeve | No | Yes |
| Frame sheet | Yes | Yes |
| Water-resistant | Yes | Yes |
| Rain cover | No | Yes |
| MOLLE | No | No |
| Hip belt | No | Yes |
| Sternum strap | Yes | No |
| Load lifters | No | No |
| Shoulder strap | Yes | No |
| Luggage pass-through | Yes | No |
| Camera compartment | No | No |
| Material | 600 denier polyester body, 200 denier polyester lining | bluesign-approved 210D ripstop nylon, 200D recycled polyester lining, 70D nylon raincover |
| Last checked | 2026-09 | 2026-09 |
Where their airline fit differs
| Airline | Limit | Cabin Zero Classic Plus Backpack 42L | REI Co-op Trail 40 Pack - Women's |
|---|---|---|---|
| Air Arabia | Carry-on | Fits | Too big |
| Air Canada | Carry-on | Fits | Too big |
| Air India | Carry-on | Fits | Too big |
| AirAsia | Carry-on | Fits | Too big |
| Alaska Airlines | Carry-on | Fits | Too big |
| American Airlines | Carry-on | Fits | Too big |
| Cebu Pacific | Carry-on | Fits | Too big |
| Delta Air Lines | Carry-on | Fits | Too big |
| Emirates | Carry-on | Fits | Too big |
| JetBlue Airways | Carry-on | Fits | Too big |
| Lufthansa | Carry-on | Fits | Too big |
| Norwegian Air Shuttle | Carry-on | Fits | Too big |
| Qantas | Carry-on | Fits | Too big |
| Ryanair | Carry-on | Fits | Too big |
| SAS | Carry-on | Fits | Too big |
| Turkish Airlines | Carry-on | Fits | Too big |
| United Airlines | Carry-on | Fits | Too big |
| Vietjet Air | Carry-on | Fits | Too big |
| Vueling | Carry-on | Fits | Too big |
| WestJet | Carry-on | Fits | Too big |
| Wizz Air | Carry-on | Fits | Too big |
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Specs come from each brand's own product page. Fit uses listed dimensions in any orientation. How we score carry-on fit.