Cotopaxi Allpa 18L Daypack vs Montane Transition Pack 18L
The Cotopaxi Allpa 18L Daypack is 18L and 0.62kg1.4lb; the Montane Transition Pack 18L is 18L and 0.6kg1.3lb. The Montane Transition Pack 18L is 0.02kg0lb lighter. The Montane Transition Pack 18L costs $15 less. The Cotopaxi Allpa 18L Daypack fits the carry-on limit of 32 of 36 major airlines and the Montane Transition Pack 18L fits 36; under the seat, 0 and 1 of 26.
| Spec | Cotopaxi Allpa 18L Daypack | Montane Transition Pack 18L |
|---|---|---|
| Price | $130 | $115Best |
| Volume | 18L | 18L |
| Weight | 0.62kg1.4lb | 0.6kg1.3lbBest |
| Carry-on compliance | 89% | 100%Best |
| Personal-item compliance | 0% | 4%Best |
| Dimensions | 43.2×27.9×20.3cm17×11×8in | 46×28×15cm18×11×6in |
| Laptop | 15" | 15.6"Best |
| Bottle pockets | n/a | 2 |
| Opening | Panel access, Traditional panel-loader with zippered main compartment | Clamshell lid fixed with an adjustable buckle and webbing |
| Warranty | Lifetime | Lifetime |
| Fit | Women's | n/a |
| Organizer | Yes | Yes |
| Shoe compartment | No | No |
| Hydration sleeve | No | No |
| Frame sheet | No | No |
| Water-resistant | Yes | Yes |
| Rain cover | No | No |
| MOLLE | No | No |
| Hip belt | No | No |
| Sternum strap | No | Yes |
| Load lifters | No | No |
| Shoulder strap | No | No |
| Luggage pass-through | Yes | No |
| Camera compartment | No | No |
| Material | Front panel 100% recycled 450D polyester TPU; body 100% recycled 840D ballistic ripstop nylon with PFAS-free C0 DWR finish and PU backing; lining 100% recycled polyester | RAPTOR Pro Lite nylon ripstop with PU face coating, HALO recycled polyester lining |
| Last checked | 2026-09 | 2026-10 |
Where their airline fit differs
| Airline | Limit | Cotopaxi Allpa 18L Daypack | Montane Transition Pack 18L |
|---|---|---|---|
| Air Arabia | Carry-on | Too big | Fits |
| Air India | Carry-on | Too big | Fits |
| Frontier Airlines | Personal item | Too big | Fits |
| Ryanair | Carry-on | Too big | Fits |
| Vueling | 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.