Boundary Supply Errant X-Pac vs. Mission Workshop "AP Sanction : VX21"

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

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

Feature by feature

Boundary Supply Errant X-PacFeatureMission Workshop "AP Sanction : VX21"
Storage
Y Compression Y
None Expanded Capacity None
3 Opening 3
N Passport N
N Passthrough N
Carry
Y Backpack Y
N Hip Belt optional
Y Sternum Strap Y
Inside
17in Laptop 15in
1 Main Compartments 1
N Organizer N
Outside
× Hard Shell ×
N Rain-fly N
1 Water Bottle Holder N
Y Water Resistant Y
Material
X-Pac1000 denier VX Cordura

Mission Workshop "AP Sanction : VX21"

Front facing view of the Mission Workshop "AP Sanction : VX21"
Capacity20 L
Weight1.2 kg
Dimensions46×31×13 cm
Airline fit94%
Price$310

Key differences between the Boundary Supply Errant X-Pac and Mission Workshop "AP Sanction : VX21"

Both have: compression straps, backpack straps, sternum strap, water resistant.

Which airlines take each bag as a carry-on

We checked both bags against the carry-on size limits of 189 airlines. 174 accept both. 1 accept only the Boundary Supply Errant X-Pac, and 3 accept only the Mission Workshop "AP Sanction : VX21".

Only the Boundary Supply Errant X-Pac fits

Air Niugini.

Only the Mission Workshop "AP Sanction : VX21" fits

American Eagle, easyJet, Ravn Alaska.

Boundary Supply Errant X-Pac vs. Mission Workshop "AP Sanction : VX21": which should you pack?

The Boundary Supply Errant X-Pac carries 2L more than the Mission Workshop "AP Sanction : VX21" (22L vs. 20L), while the Mission Workshop "AP Sanction : VX21" is the lighter pack at 1.2kg (vs. 1.4kg). For carry-on flexibility, the Mission Workshop "AP Sanction : VX21" fits 94% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Boundary Supply Errant X-Pac; if you want to travel lighter, the Mission Workshop "AP Sanction : VX21" is the better call.