Boundary Supply Prima vs. Alpaka Gear Elements Travel Backpack
Two carry-on travel backpacks, compared spec for spec.
Boundary Supply Prima
| Capacity | 30 L |
| Weight | 1.9 kg |
| Dimensions | 53×31×18 cm |
| Airline fit | 88% |
| Price | $319 |
Feature by feature
| Boundary Supply Prima | Feature | Alpaka Gear Elements Travel Backpack |
|---|---|---|
| Storage | ||
| 2 | Compression | 2 |
| None | Expanded Capacity | None |
| 3 | Opening | 1 |
| top | Passport | front, side |
| Y | Passthrough | Y |
| Carry | ||
| Y | Backpack | Y |
| removable | Hip Belt | hideable |
| removable | Sternum Strap | removable |
| Inside | ||
| 16in | Laptop | 16in |
| 0 | Main Compartments | 3 |
| Y | Organizer | Y |
| Outside | ||
| × | Hard Shell | × |
| N | Rain-fly | N |
| 1, side | Water Bottle Holder | 1, side |
| Y | Water Resistant | Y |
| Material | |
| 500D Kodra Nylon YKK StormGuard | X-Pac VX42 in Black Axoflux Recycled Fabric (POLY 600D) in Black, Army Green & Blue |
Alpaka Gear Elements Travel Backpack
| Capacity | 35 L |
| Weight | 1.6 kg |
| Dimensions | 52×31×20 cm |
| Airline fit | 88% |
| Price | $260 |
Key differences between the Boundary Supply Prima and Alpaka Gear Elements Travel Backpack
- Opening: Top flap on the Boundary Supply Prima; Clamshell on the Alpaka Gear Elements Travel Backpack.
- Passport pocket: Top on the Boundary Supply Prima; Front, side on the Alpaka Gear Elements Travel Backpack.
- Hip belt: Removable on the Boundary Supply Prima; Hideable on the Alpaka Gear Elements Travel Backpack.
Both have: compression straps, luggage passthrough, backpack straps, sternum strap, laptop sleeve, built-in organizer, water bottle pockets, water resistant.
Which airlines take each bag as a carry-on
We checked both bags against the carry-on size limits of 189 airlines. 167 accept both. Every airline that takes one takes the other.
Boundary Supply Prima vs. Alpaka Gear Elements Travel Backpack: which should you pack?
The Alpaka Gear Elements Travel Backpack carries 5L more than the Boundary Supply Prima (30L vs. 35L), while the Alpaka Gear Elements Travel Backpack is the lighter pack at 1.6kg (vs. 1.9kg). For carry-on flexibility, the Boundary Supply Prima fits 88% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Alpaka Gear Elements Travel Backpack; if you want to travel lighter, the Alpaka Gear Elements Travel Backpack is the better call.