Arc'teryx Mantis 26 Backpack vs Cotopaxi Allpa 26L Daypack
The Arc'teryx Mantis 26 Backpack is 26L and 0.8kg1.8lb; the Cotopaxi Allpa 26L Daypack is 26L and 0.85kg1.9lb. The Arc'teryx Mantis 26 Backpack is 0.05kg0.1lb lighter. The Cotopaxi Allpa 26L Daypack costs $10 less. The Arc'teryx Mantis 26 Backpack fits the carry-on limit of 15 of 36 major airlines and the Cotopaxi Allpa 26L Daypack fits 30; under the seat, 0 and 0 of 26.
| Spec | Arc'teryx Mantis 26 Backpack | Cotopaxi Allpa 26L Daypack |
|---|---|---|
| Price | $160 | $150Best |
| Volume | 26L | 26L |
| Weight | 0.8kg1.8lbBest | 0.85kg1.9lb |
| Carry-on compliance | 42% | 83%Best |
| Personal-item compliance | 0% | 0% |
| Dimensions | 48×28×25cm19×11×10in | 52.1×33×22.9cm20.5×13×9in |
| Laptop | sleeve, size not published | 16" |
| Bottle pockets | 2 | n/a |
| Opening | Panel access, Panel-load (drawbridge-style) main compartment | Panel access, Panel loading |
| Warranty | No fixed term | Lifetime |
| Organizer | No | Yes |
| Shoe compartment | No | No |
| Hydration sleeve | Yes | No |
| Frame sheet | Yes | No |
| Water-resistant | No | Yes |
| Rain cover | No | No |
| MOLLE | No | No |
| Hip belt | No | No |
| Sternum strap | Yes | No |
| Load lifters | No | No |
| Shoulder strap | No | No |
| Luggage pass-through | No | Yes |
| Camera compartment | No | No |
| Material | 600D DTY rePET plain weave w/ FC0 DWR, 100% recycled polyester | 100% recycled fabrics; water-resistant TPU-coated shell with PFAS-free C0 DWR finish and PU backing |
| Last checked | 2026-09 | 2026-09 |
Where their airline fit differs
| Airline | Limit | Arc'teryx Mantis 26 Backpack | Cotopaxi Allpa 26L Daypack |
|---|---|---|---|
| Air Canada | Carry-on | Too big | Fits |
| AirAsia | Carry-on | Too big | Fits |
| Alaska Airlines | Carry-on | Too big | Fits |
| American Airlines | Carry-on | Too big | Fits |
| Cebu Pacific | Carry-on | Too big | Fits |
| Delta Air Lines | Carry-on | Too big | Fits |
| JetBlue Airways | Carry-on | Too big | Fits |
| Lufthansa | Carry-on | Too big | Fits |
| Norwegian Air Shuttle | Carry-on | Too big | Fits |
| Qantas | Carry-on | Too big | Fits |
| Qatar Airways | Carry-on | Fits | Too big |
| SAS | Carry-on | Too big | Fits |
| Turkish Airlines | Carry-on | Too big | Fits |
| United Airlines | Carry-on | Too big | Fits |
| Vietjet Air | Carry-on | Too big | Fits |
| WestJet | Carry-on | Too big | Fits |
| Wizz Air | Carry-on | Too big | Fits |
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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.