Boundary Supply Prima vs. Aer City Pack
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 | Aer City Pack |
|---|---|---|
| Storage | ||
| 2 | Compression | N |
| None | Expanded Capacity | None |
| 3 | Opening | 1 |
| top | Passport | top |
| Y | Passthrough | Y |
| Carry | ||
| Y | Backpack | Y |
| removable | Hip Belt | N |
| removable | Sternum Strap | removable |
| Inside | ||
| 16in | Laptop | 16in |
| 0 | Main Compartments | 4 |
| 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 | 1680D Cordura® ballistic nylon exterior |
Key differences between the Boundary Supply Prima and Aer City Pack
- Compression straps: 2 on the Boundary Supply Prima; No on the Aer City Pack.
- Opening: Top flap on the Boundary Supply Prima; Clamshell on the Aer City Pack.
- Hip belt: Removable on the Boundary Supply Prima; No on the Aer City Pack.
Both have: passport pocket, 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. 0 accept only the Boundary Supply Prima, and 11 accept only the Aer City Pack.
Only the Aer City Pack fits
Air Niugini, American Eagle, Belavia, easyJet, Etihad Airways, Oman Air, Qatar Airways, Ravn Alaska, Regional Express, Royal Jordanian, Virgin Australia.
Boundary Supply Prima vs. Aer City Pack: which should you pack?
The Boundary Supply Prima carries 16L more than the Aer City Pack (30L vs. 14L), while the Aer City Pack is the lighter pack at 1.1kg (vs. 1.9kg). For carry-on flexibility, the Aer City Pack fits 94% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Boundary Supply Prima; if you want to travel lighter, the Aer City Pack is the better call.