Cabin Zero Classic Backpack 44L vs Gossamer Gear G4-20 Ultralight 42 Backpack
The Cabin Zero Classic Backpack 44L is 44L and 0.76kg1.7lb; the Gossamer Gear G4-20 Ultralight 42 Backpack is 42L and 0.7kg1.5lb. The Gossamer Gear G4-20 Ultralight 42 Backpack is 0.06kg0.1lb lighter. The Cabin Zero Classic Backpack 44L costs $97 less. The Cabin Zero Classic Backpack 44L fits the carry-on limit of 28 of 36 major airlines and the Gossamer Gear G4-20 Ultralight 42 Backpack fits 3; under the seat, 0 and 0 of 26.
| Spec | Cabin Zero Classic Backpack 44L | Gossamer Gear G4-20 Ultralight 42 Backpack |
|---|---|---|
| Price | $108Best | $205 |
| Volume | 44L | 42L |
| Weight | 0.76kg1.7lb | 0.7kg1.5lbBest |
| Carry-on compliance | 78%Best | 8% |
| Personal-item compliance | 0% | 0% |
| Dimensions | 51×36×18cm20×14×7in | 59.9×29×11.9cm23.5×11.5×4.5in |
| Laptop | 18" | no laptop sleeve |
| Compartments | n/a | 1 |
| Opening | Clamshell, Clamshell opening | Roll-top, Extendable roll top with dual closure options |
| Warranty | Lifetime | 1 year |
| Torso length | n/a | 29.2 to 59.7cm (11.5 to 23.5in) |
| Sizes | n/a | Small, Medium, Large |
| Organizer | Yes | No |
| Shoe compartment | No | No |
| Hydration sleeve | No | No |
| Frame sheet | No | No |
| Water-resistant | Yes | No |
| Rain cover | No | No |
| MOLLE | No | No |
| Hip belt | No | Yes |
| Sternum strap | No | No |
| Load lifters | No | No |
| Shoulder strap | No | No |
| Luggage pass-through | No | No |
| Camera compartment | No | No |
| Material | 600 denier polyester body, 200 denier polyester lining, water-resistant | 70D and 100D recycled Robic nylon, PFAS free |
| Last checked | 2026-09 | 2026-09 |
Where their airline fit differs
| Airline | Limit | Cabin Zero Classic Backpack 44L | Gossamer Gear G4-20 Ultralight 42 Backpack |
|---|---|---|---|
| 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 |
| Allegiant Air | Carry-on | Fits | Too big |
| American Airlines | Carry-on | Fits | Too big |
| ANA (All Nippon Airways) | Carry-on | Fits | Too big |
| British Airways | Carry-on | Fits | Too big |
| Cebu Pacific | Carry-on | Fits | Too big |
| Delta Air Lines | Carry-on | Fits | Too big |
| easyJet | 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 |
| Vietjet Air | Carry-on | Fits | Too big |
| Volaris | 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.