Cotopaxi Cusco Backpack 26L vs. Unbox Therapy X Pacsafe 25L Anti-Theft Backpack

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

Cotopaxi Cusco Backpack 26L

Front facing view of the Cotopaxi Cusco Backpack 26L
Capacity26 L
Weight0.7 kg
Dimensions53×33×23 cm
Airline fit70%
Price$110

Feature by feature

Cotopaxi Cusco Backpack 26LFeatureUnbox Therapy X Pacsafe 25L Anti-Theft Backpack
Storage
N Compression N
None Expanded Capacity None
4 Opening 4
N Passport Y
N Passthrough N
Carry
Y Backpack Y
N Hip Belt N
Y Sternum Strap N
Inside
15in Laptop 15in
1 Main Compartments 1
Y Organizer Y
Outside
× Hard Shell ×
N Rain-fly N
2 Water Bottle Holder 2
Y Water Resistant Y
Material
100% repurposed 600D polyester1000D Polina with wax coating, 150D Recycled polyester

Unbox Therapy X Pacsafe 25L Anti-Theft Backpack

Front facing view of the Unbox Therapy X Pacsafe 25L Anti-Theft Backpack
Capacity25 L
Weight1.05 kg
Dimensions47×32×16 cm
Airline fit92%
Price$180

Key differences between the Cotopaxi Cusco Backpack 26L and Unbox Therapy X Pacsafe 25L Anti-Theft Backpack

Both have: backpack straps, laptop sleeve, built-in organizer, 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. 132 accept both. 0 accept only the Cotopaxi Cusco Backpack 26L, and 42 accept only the Unbox Therapy X Pacsafe 25L Anti-Theft Backpack.

Only the Unbox Therapy X Pacsafe 25L Anti-Theft Backpack fits

Air Baltic, Air China, Air Malta, Air Serbia, Air Seychelles, Asiana Airlines, ATA Airlines, Belavia, Blue Air, Bulgaria Air, China Eastern, Emirates Airlines, Enter Air, Etihad Airways, flybe, Icelandair, InselAir, Juneyao Airlines, Liat Airlines, Luxair, Meridiana Fly, Nordwind Airlines, Oman Air, Pakistan International, Qatar Airways, Regional Express, Royal Brunei Airlines, Royal Jordanian, Ryanair, S7, Shandong Airlines, Shenzhen Airlines, Sun Express, TAP Air Portugal, TAROM, Tianjin Airlines (A320 & E190), TUI, Ukraine International, VIM Airlines (Closed), Virgin Australia, Volotea, Xiamen.

Cotopaxi Cusco Backpack 26L vs. Unbox Therapy X Pacsafe 25L Anti-Theft Backpack: which should you pack?

The Cotopaxi Cusco Backpack 26L carries 1L more than the Unbox Therapy X Pacsafe 25L Anti-Theft Backpack (26L vs. 25L), while the Cotopaxi Cusco Backpack 26L is the lighter pack at 0.7kg (vs. 1.05kg). For carry-on flexibility, the Unbox Therapy X Pacsafe 25L Anti-Theft Backpack fits 92% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Cotopaxi Cusco Backpack 26L; if you want to travel lighter, the Cotopaxi Cusco Backpack 26L is the better call.