Ortlieb Light-Pack Two vs. Mammut Aenergy 12
Two carry-on travel backpacks, compared spec for spec.
Ortlieb Light-Pack Two
| Capacity | 25 L |
| Weight | 0.33 kg |
| Dimensions | 47×26×15.5 cm |
| Airline fit | 93% |
| Price | $120 |
Feature by feature
| Ortlieb Light-Pack Two | Feature | Mammut Aenergy 12 |
|---|---|---|
| Storage | ||
| N | Compression | N |
| None | Expanded Capacity | None |
| 4 | Opening | 1 |
| 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 |
| 4 | Water Bottle Holder | N |
| Y | Water Resistant | N |
| Material | |
| PS21 | 100% Polyamide |
Key differences between the Ortlieb Light-Pack Two and Mammut Aenergy 12
- Opening: Top zip on the Ortlieb Light-Pack Two; Clamshell on the Mammut Aenergy 12.
- Water bottle pockets: 4 on the Ortlieb Light-Pack Two; No on the Mammut Aenergy 12.
- Water resistant: Yes on the Ortlieb Light-Pack Two; No on the Mammut Aenergy 12.
Both have: backpack straps, hip belt, sternum strap.
Which airlines take each bag as a carry-on
We checked both bags against the carry-on size limits of 189 airlines. 176 accept both. 0 accept only the Ortlieb Light-Pack Two, and 3 accept only the Mammut Aenergy 12.
Only the Mammut Aenergy 12 fits
American Eagle, easyJet, Ravn Alaska.
Ortlieb Light-Pack Two vs. Mammut Aenergy 12: which should you pack?
The Ortlieb Light-Pack Two carries 13L more than the Mammut Aenergy 12 (25L vs. 12L), while the Mammut Aenergy 12 is the lighter pack at 0.3kg (vs. 0.33kg). For carry-on flexibility, the Mammut Aenergy 12 fits 95% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Ortlieb Light-Pack Two; if you want to travel lighter, the Mammut Aenergy 12 is the better call.