Cotopaxi Tarak Backpack 20L Del Día vs. Boundary Supply Errant X-Pac

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

Cotopaxi Tarak Backpack 20L Del Día

Front facing view of the Cotopaxi Tarak Backpack 20L Del Día
Capacity20 L
Weight562 kg
Dimensions50.8×30.5×17.8 cm
Airline fit89%
Price$100

Feature by feature

Cotopaxi Tarak Backpack 20L Del DíaFeatureBoundary Supply Errant X-Pac
Storage
Y Compression Y
None Expanded Capacity None
3 Opening 3
N Passport N
N Passthrough N
Carry
Y Backpack Y
removable Hip Belt N
Y Sternum Strap Y
Inside
N Laptop 17in
1 Main Compartments 1
N Organizer N
Outside
× Hard Shell ×
N Rain-fly N
N Water Bottle Holder 1
Y Water Resistant Y
Material
210D ripstop nylonX-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 Cotopaxi Tarak Backpack 20L Del Día and Boundary Supply Errant X-Pac

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. 169 accept both. 0 accept only the Cotopaxi Tarak Backpack 20L Del Día, and 6 accept only the Boundary Supply Errant X-Pac.

Only the Boundary Supply Errant X-Pac fits

Air Niugini, Belavia, Etihad Airways, Qatar Airways, Regional Express, Virgin Australia.

Cotopaxi Tarak Backpack 20L Del Día vs. Boundary Supply Errant X-Pac: which should you pack?

The Boundary Supply Errant X-Pac carries 2L more than the Cotopaxi Tarak Backpack 20L Del Día (20L vs. 22L), while the Boundary Supply Errant X-Pac is the lighter pack at 1.4kg (vs. 562kg). For carry-on flexibility, the Boundary Supply Errant X-Pac fits 93% 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 Boundary Supply Errant X-Pac is the better call.