Bellroy Shift Backpack vs. Boundary Supply Rennen X-Pac Daypack
Two carry-on travel backpacks, compared spec for spec.
Bellroy Shift Backpack
| Capacity | 22 L |
| Weight | 1.25 kg |
| Dimensions | 55×30×20 cm |
| Airline fit | 86% |
| Price | $169 |
Feature by feature
| Bellroy Shift Backpack | Feature | Boundary Supply Rennen X-Pac Daypack |
|---|---|---|
| Storage | ||
| N | Compression | N |
| None | Expanded Capacity | None |
| 3 | Opening | 4 |
| N | Passport | N |
| N | Passthrough | N |
| Carry | ||
| Y | Backpack | Y |
| N | Hip Belt | N |
| removable | Sternum Strap | N |
| Inside | ||
| 15in | Laptop | 15in |
| 1 | Main Compartments | 1 |
| N | Organizer | N |
| Outside | ||
| × | Hard Shell | × |
| N | Rain-fly | N |
| 1 | Water Bottle Holder | 1 |
| Y | Water Resistant | Y |
| Material | |
| Venture-weave polyester | Custom VX21 X-Pac material |
Boundary Supply Rennen X-Pac Daypack
| Capacity | 22 L |
| Weight | 0.9 kg |
| Dimensions | 46×28×18 cm |
| Airline fit | 95% |
| Price | $170 |
Key differences between the Bellroy Shift Backpack and Boundary Supply Rennen X-Pac Daypack
- Opening: Top flap on the Bellroy Shift Backpack; Top zip on the Boundary Supply Rennen X-Pac Daypack.
- Sternum strap: Removable on the Bellroy Shift Backpack; No on the Boundary Supply Rennen X-Pac Daypack.
Both have: backpack straps, laptop sleeve, 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. 163 accept both. 0 accept only the Bellroy Shift Backpack, and 16 accept only the Boundary Supply Rennen X-Pac Daypack.
Only the Boundary Supply Rennen X-Pac Daypack fits
Air Niugini, American Eagle, Belavia, easyJet, Etihad Airways, Great Lakes Airlines, Liat Airlines, Oman Air, Qatar Airways, Ravn Alaska, Regional Express, Royal Jordanian, Scoot, Tiger Airways, Virgin Australia, WestJet.
Bellroy Shift Backpack vs. Boundary Supply Rennen X-Pac Daypack: which should you pack?
The Bellroy Shift Backpack carries the same capacity as the Boundary Supply Rennen X-Pac Daypack (22L vs. 22L), while the Boundary Supply Rennen X-Pac Daypack is the lighter pack at 0.9kg (vs. 1.25kg). For carry-on flexibility, the Boundary Supply Rennen X-Pac Daypack fits 95% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Bellroy Shift Backpack; if you want to travel lighter, the Boundary Supply Rennen X-Pac Daypack is the better call.