Doughnut Christopher vs Rab Airox 18L Day Pack
The Doughnut Christopher is 18L and 0.72kg1.6lb; the Rab Airox 18L Day Pack is 18L and 0.73kg1.6lb. The Doughnut Christopher is 0.01kg0lb lighter. The Doughnut Christopher fits the carry-on limit of 36 of 36 major airlines and the Rab Airox 18L Day Pack fits 31; under the seat, 7 and 0 of 26.
| Spec | Doughnut Christopher | Rab Airox 18L Day Pack |
|---|---|---|
| Price | n/a | $165 |
| Volume | 18L | 18L |
| Weight | 0.72kg1.6lbBest | 0.73kg1.6lb |
| Carry-on compliance | 100%Best | 86% |
| Personal-item compliance | 27%Best | 0% |
| Dimensions | 45×32×15cm17.5×12.5×6in | 50×29×23cm19.5×11.5×9in |
| Laptop | 15" | n/a |
| Opening | Roll-top, Roll-top closure with buckle | Panel access, Panel loader with zipped entry |
| Warranty | 1 year | Lifetime |
| Organizer | No | No |
| Shoe compartment | No | No |
| Hydration sleeve | No | Yes |
| Frame sheet | No | No |
| Water-resistant | Yes | No |
| Rain cover | No | Yes |
| 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 | 600D Recycled Polyester (RPET) | 140D nylon (69% recycled) with yarn dyed nylon 210D rip stop, 420D Nylon secondary, Embossed 200d Polyester lining (100% recycled) |
| Last checked | 2026-10 | 2026-10 |
Where their airline fit differs
| Airline | Limit | Doughnut Christopher | Rab Airox 18L Day Pack |
|---|---|---|---|
| Air Arabia | Carry-on | Fits | Too big |
| Air India | Carry-on | Fits | Too big |
| Allegiant Air | Personal item | Fits | Too big |
| American Airlines | Personal item | Fits | Too big |
| British Airways | Personal item | Fits | Too big |
| easyJet | Personal item | Fits | Too big |
| Emirates | Carry-on | Fits | Too big |
| Frontier Airlines | Personal item | Fits | Too big |
| LATAM Airlines | Personal item | Fits | Too big |
| Ryanair | Carry-on | Fits | Too big |
| Volaris | Personal item | Fits | Too big |
| Vueling | 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.