Aer Travel Pack 4 35L vs. Aer Travel Pack 3 X-Pac
Two carry-on travel backpacks, compared spec for spec.
Aer Travel Pack 4 35L
| Capacity | 35 L |
| Weight | 1.8 kg |
| Dimensions | 55×34×23 cm |
| Airline fit | 68% |
| Price | $260 |
Feature by feature
| Aer Travel Pack 4 35L | Feature | Aer Travel Pack 3 X-Pac |
|---|---|---|
| Storage | ||
| N | Compression | 4 |
| None | Expanded Capacity | None |
| 1 | Opening | 1 |
| top | Passport | top, side |
| Y | Passthrough | Y |
| Carry | ||
| Y | Backpack | Y |
| optional | Hip Belt | optional |
| removable | Sternum Strap | removable |
| Inside | ||
| 16in | Laptop | 16in |
| 5 | Main Compartments | 4 |
| Y | Organizer | Y |
| Outside | ||
| × | Hard Shell | × |
| N | Rain-fly | N |
| 2, side | Water Bottle Holder | 1, side |
| Y | Water Resistant | Y |
| Material | |
| 1680D CORDURA® ballistic nylon exterior (bluesign® approved) | VX-42 X-Pac (also in 1680D Cordura ballistic nylon) |
Aer Travel Pack 3 X-Pac
| Capacity | 35 L |
| Weight | 1.8 kg |
| Dimensions | 55×33×22 cm |
| Airline fit | 69% |
| Price | $280 |
Key differences between the Aer Travel Pack 4 35L and Aer Travel Pack 3 X-Pac
- Compression straps: No on the Aer Travel Pack 4 35L; 4 on the Aer Travel Pack 3 X-Pac.
- Passport pocket: Top on the Aer Travel Pack 4 35L; Top, side on the Aer Travel Pack 3 X-Pac.
- Main compartments: 5 on the Aer Travel Pack 4 35L; 4 on the Aer Travel Pack 3 X-Pac.
- Water bottle pockets: 2, side on the Aer Travel Pack 4 35L; 1, side on the Aer Travel Pack 3 X-Pac.
Both have: luggage passthrough, backpack straps, hip belt, 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. 129 accept both. 0 accept only the Aer Travel Pack 4 35L, and 1 accept only the Aer Travel Pack 3 X-Pac.
Only the Aer Travel Pack 3 X-Pac fits
Pakistan International.
Aer Travel Pack 4 35L vs. Aer Travel Pack 3 X-Pac: which should you pack?
The Aer Travel Pack 4 35L carries the same capacity as the Aer Travel Pack 3 X-Pac (35L vs. 35L), while the Aer Travel Pack 4 35L is the lighter pack at 1.8kg (vs. 1.8kg). For carry-on flexibility, the Aer Travel Pack 3 X-Pac fits 69% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Aer Travel Pack 4 35L; if you want to travel lighter, the Aer Travel Pack 4 35L is the better call.