Bellroy Classic Backpack Premium Edition vs. Boundary Supply Rennen X-Pac Daypack

Two carry-on travel backpacks, compared spec for spec.

Bellroy Classic Backpack Premium Edition

Front facing view of the Bellroy Classic Backpack Premium Edition
Capacity20 L
Weight0.9 kg
Dimensions45×32×18 cm
Airline fit95%
Price$229

Feature by feature

Bellroy Classic Backpack Premium EditionFeatureBoundary Supply Rennen X-Pac Daypack
Storage
N Compression N
None Expanded Capacity None
4 Opening 4
Y Passport N
N Passthrough N
Carry
Y Backpack Y
N Hip Belt N
N Sternum Strap N
Inside
15in Laptop 15in
1 Main Compartments 1
N Organizer N
Outside
× Hard Shell ×
N Rain-fly N
N Water Bottle Holder 1
Y Water Resistant Y
Material
Custom-developed leatherCustom VX21 X-Pac material

Boundary Supply Rennen X-Pac Daypack

Front facing view of the Boundary Supply Rennen X-Pac Daypack
Capacity22 L
Weight0.9 kg
Dimensions46×28×18 cm
Airline fit95%
Price$170

Key differences between the Bellroy Classic Backpack Premium Edition and Boundary Supply Rennen X-Pac Daypack

Both have: backpack straps, laptop sleeve, water resistant.

Which airlines take each bag as a carry-on

We checked both bags against the carry-on size limits of 189 airlines. 177 accept both. 2 accept only the Bellroy Classic Backpack Premium Edition, and 2 accept only the Boundary Supply Rennen X-Pac Daypack.

Only the Bellroy Classic Backpack Premium Edition fits

Air Tahiti, Gulf Air.

Only the Boundary Supply Rennen X-Pac Daypack fits

Air Niugini, Great Lakes Airlines.

Bellroy Classic Backpack Premium Edition vs. Boundary Supply Rennen X-Pac Daypack: which should you pack?

The Boundary Supply Rennen X-Pac Daypack carries 2L more than the Bellroy Classic Backpack Premium Edition (20L vs. 22L), while the Bellroy Classic Backpack Premium Edition is the lighter pack at 0.9kg (vs. 0.9kg). For carry-on flexibility, the Bellroy Classic Backpack Premium Edition fits 95% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Boundary Supply Rennen X-Pac Daypack; if you want to travel lighter, the Bellroy Classic Backpack Premium Edition is the better call.