Boundary Supply Errant Daypack vs. Boundary Supply Errant X-Pac

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

Boundary Supply Errant Daypack

Front facing view of the Boundary Supply Errant Daypack
Capacity22 L
Weight1.4 kg
Dimensions48×26×14 cm
Airline fit93%
Price$269

Feature by feature

Boundary Supply Errant DaypackFeatureBoundary Supply Errant X-Pac
Storage
1 Compression Y
None Expanded Capacity None
1 Opening 3
back Passport N
Y Passthrough N
Carry
Y Backpack Y
removable Hip Belt N
removable Sternum Strap Y
Inside
15in Laptop 17in
5 Main Compartments 1
N Organizer N
Outside
× Hard Shell ×
N Rain-fly N
1, side Water Bottle Holder 1
Y Water Resistant Y
Material
500D Duramax KodraX-Pac

Boundary Supply Errant X-Pac

Front facing view of the Boundary Supply Errant X-Pac
Capacity22 L
Weight1.4 kg
Dimensions48×29×14 cm
Airline fit93%
Price$250

Key differences between the Boundary Supply Errant Daypack and Boundary Supply Errant X-Pac

Both have: backpack straps, water resistant.

Which airlines take each bag as a carry-on

We checked both bags against the carry-on size limits of 189 airlines. 175 accept both. 1 accept only the Boundary Supply Errant Daypack, and 0 accept only the Boundary Supply Errant X-Pac.

Only the Boundary Supply Errant Daypack fits

Great Lakes Airlines.

Boundary Supply Errant Daypack vs. Boundary Supply Errant X-Pac: which should you pack?

The Boundary Supply Errant Daypack carries the same capacity as the Boundary Supply Errant X-Pac (22L vs. 22L), while the Boundary Supply Errant Daypack is the lighter pack at 1.4kg (vs. 1.4kg). For carry-on flexibility, the Boundary Supply Errant Daypack fits 93% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Boundary Supply Errant Daypack; if you want to travel lighter, the Boundary Supply Errant Daypack is the better call.