Patagonia Tres MLC® 45L vs. Cotopaxi Allpa Travel Pack 42L
Two carry-on travel backpacks, compared spec for spec.
Patagonia Tres MLC® 45L
| Capacity | 45 L |
| Weight | 1.5 kg |
| Dimensions | 54×41×18 cm |
| Airline fit | 26% |
| Price | $179 |
Feature by feature
| Patagonia Tres MLC® 45L | Feature | Cotopaxi Allpa Travel Pack 42L |
|---|---|---|
| Storage | ||
| N | Compression | N |
| None | Expanded Capacity | None |
| 1 | Opening | 1 |
| N | Passport | front |
| Y | Passthrough | Y |
| Carry | ||
| hideable | Backpack | hideable |
| N | Hip Belt | hideable |
| Y | Sternum Strap | Y |
| Inside | ||
| 15in | Laptop | 15in |
| 1 | Main Compartments | 3 |
| Y | Organizer | Y |
| Outside | ||
| × | Hard Shell | × |
| N | Rain-fly | N |
| N | Water Bottle Holder | 1, side |
| Y | Water Resistant | Y |
| Material | |
| 630-denier nylon, 200-denier 100% recycled polyeste | 100% recycled 840D TPU-coated nylon |
Cotopaxi Allpa Travel Pack 42L
| Capacity | 42 L |
| Weight | 1.4 kg |
| Dimensions | 56×36×27 cm |
| Airline fit | 2% |
| Price | $250 |
Key differences between the Patagonia Tres MLC® 45L and Cotopaxi Allpa Travel Pack 42L
- Passport pocket: No on the Patagonia Tres MLC® 45L; Front on the Cotopaxi Allpa Travel Pack 42L.
- Hip belt: No on the Patagonia Tres MLC® 45L; Hideable on the Cotopaxi Allpa Travel Pack 42L.
- Main compartments: 1 on the Patagonia Tres MLC® 45L; 3 on the Cotopaxi Allpa Travel Pack 42L.
- Water bottle pockets: No on the Patagonia Tres MLC® 45L; 1, side on the Cotopaxi Allpa Travel Pack 42L.
Both have: luggage passthrough, backpack straps, sternum strap, laptop sleeve, built-in organizer, water resistant.
Which airlines take each bag as a carry-on
We checked both bags against the carry-on size limits of 189 airlines. 4 accept both. 45 accept only the Patagonia Tres MLC® 45L, and 0 accept only the Cotopaxi Allpa Travel Pack 42L.
Only the Patagonia Tres MLC® 45L fits
Adria Airways, Aegean Airlines, Air Astana, Air Caraibes, Air Europa, Air Koryo, Air New Zealand, Air Nostrum, Air Tahiti Nui, Atlas Global, Azul Linhas, British Airways, Caribbean Airlines, China Southern, Cubana de Aviacion, Czech Airlines, EL AL, Finnair, Frontier Airlines, Hainan Airlines, Iberia, Iran Air, Iran Aseman Air, Jet2, Korean Air, Kuwait Air, Onur Air, PenAir, Philippine Airlines, Royal Air Morocco, Saudi Arabian Airlines, Sichuan Airlines, SilkAir, Silver Airways, Singapore Airlines, Southwest Airlines, SpiceJet, Spirit Airlines, TAAG Angola, TAM Airlines, Thai Airways, Travel Service Airlines, Ural Airlines, Uzbekistan Air, WOW Airlines.
Patagonia Tres MLC® 45L vs. Cotopaxi Allpa Travel Pack 42L: which should you pack?
The Patagonia Tres MLC® 45L carries 3L more than the Cotopaxi Allpa Travel Pack 42L (45L vs. 42L), while the Cotopaxi Allpa Travel Pack 42L is the lighter pack at 1.4kg (vs. 1.5kg). For carry-on flexibility, the Patagonia Tres MLC® 45L fits 26% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Patagonia Tres MLC® 45L; if you want to travel lighter, the Cotopaxi Allpa Travel Pack 42L is the better call.