Patagonia Ascensionist Pack 55L vs. Atom Pack "The Mo"
Two carry-on travel backpacks, compared spec for spec.
Patagonia Ascensionist Pack 55L
| Capacity | 55 L |
| Weight | 1.28 kg |
| Dimensions | 67×32×20 cm |
| Airline fit | 1% |
| Price | $219 |
Feature by feature
| Patagonia Ascensionist Pack 55L | Feature | Atom Pack "The Mo" |
|---|---|---|
| Storage | ||
| removable | Compression | Y |
| None | Expanded Capacity | None |
| 0 | Opening | 2 |
| N | Passport | N |
| N | Passthrough | N |
| Carry | ||
| Y | Backpack | Y |
| removable | Hip Belt | removable |
| removable | Sternum Strap | removable |
| Inside | ||
| N | Laptop | N |
| 1 | Main Compartments | 1 |
| N | Organizer | N |
| Outside | ||
| × | Hard Shell | × |
| N | Rain-fly | N |
| N | Water Bottle Holder | 2 |
| Y | Water Resistant | Y |
| Material | |
| 420-denier 100% recycled nylon ripstop, 0-denier 100% nylon ripstop | VX21 X-Pac fabric |
Atom Pack "The Mo"
| Capacity | 40 L |
| Weight | 0 kg |
| Dimensions | 91×84×74 cm |
| Airline fit | 0% |
| Price | $245 |
Key differences between the Patagonia Ascensionist Pack 55L and Atom Pack "The Mo"
- Compression straps: Removable on the Patagonia Ascensionist Pack 55L; Yes on the Atom Pack "The Mo".
- Opening: Other on the Patagonia Ascensionist Pack 55L; Rolltop on the Atom Pack "The Mo".
- Water bottle pockets: No on the Patagonia Ascensionist Pack 55L; 2 on the Atom Pack "The Mo".
Both have: backpack straps, hip belt, sternum strap, water resistant.
Which airlines take each bag as a carry-on
We checked both bags against the carry-on size limits of 189 airlines. 0 accept both. 2 accept only the Patagonia Ascensionist Pack 55L, and 0 accept only the Atom Pack "The Mo".
Only the Patagonia Ascensionist Pack 55L fits
Azul Airlines, Virgin America.
Patagonia Ascensionist Pack 55L vs. Atom Pack "The Mo": which should you pack?
The Patagonia Ascensionist Pack 55L carries 15L more than the Atom Pack "The Mo" (55L vs. 40L), and the two are closely matched on weight. For carry-on flexibility, the Patagonia Ascensionist Pack 55L fits 1% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Patagonia Ascensionist Pack 55L; if you want to travel lighter, the Patagonia Ascensionist Pack 55L is the better call.