Aer Travel Pack 3 vs Aer Travel Pack 4 35L
The Aer Travel Pack 3 is 35L and 1.87kg4.1lb; the Aer Travel Pack 4 35L is 35L and 1.8kg4lb. The Aer Travel Pack 4 35L is 0.07kg0.2lb lighter. The Aer Travel Pack 3 costs $10 less. The Aer Travel Pack 3 fits the carry-on limit of 31 of 36 major airlines and the Aer Travel Pack 4 35L fits 30; under the seat, 0 and 0 of 26.
| Spec | Aer Travel Pack 3 | Aer Travel Pack 4 35L |
|---|---|---|
| Price | $249Best | $259 |
| Volume | 35L | 35L |
| Weight | 1.87kg4.1lb | 1.8kg4lbBest |
| Carry-on compliance | 86%Best | 83% |
| Personal-item compliance | 0% | 0% |
| Dimensions | 54.5×33×21.5cm21.5×13×8.5in | 55×34×23cm21.5×13.5×9in |
| Laptop | 16" | 16" |
| Compartments | n/a | 4 |
| Bottle pockets | 1 | 2 |
| Compression straps | n/a | 0 |
| Opening | Clamshell, Lay-flat main compartment | Clamshell, clamshell (lay-flat main compartment) |
| Warranty | Lifetime | Lifetime |
| Organizer | Yes | Yes |
| Shoe compartment | No | No |
| Hydration sleeve | No | No |
| Frame sheet | Yes | Yes |
| Water-resistant | No | No |
| Rain cover | No | No |
| MOLLE | No | No |
| Hip belt | Insert sold separately | No |
| Sternum strap | No | No |
| Load lifters | Yes | Yes |
| Shoulder strap | No | No |
| Luggage pass-through | Yes | Yes |
| Camera compartment | No | No |
| Material | 1680D CORDURA ballistic nylon exterior (bluesign approved), YKK zippers, Duraflex hardware | 1680D CORDURA ballistic nylon exterior (bluesign approved), ripstop nylon interior, YKK zippers, Duraflex hardware |
| Last checked | 2026-10 | 2026-09 |
Where their airline fit differs
| Airline | Limit | Aer Travel Pack 3 | Aer Travel Pack 4 35L |
|---|---|---|---|
| Emirates | Carry-on | Fits | Too big |
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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.