Patagonia Tres Backpack 25L vs. OPPOSETHIS Ark - 2020

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

Patagonia Tres Backpack 25L

Front facing view of the Patagonia Tres Backpack 25L
Capacity25 L
Weight0.9 kg
Dimensions48×31×17 cm
Airline fit92%
Price$129

Feature by feature

Patagonia Tres Backpack 25LFeatureOPPOSETHIS Ark - 2020
Storage
N Compression N
None Expanded Capacity None
1 Opening 1
N Passport N
Y Passthrough N
Carry
hideable Backpack N
N Hip Belt N
Y Sternum Strap Y
Inside
15in Laptop 16in
1 Main Compartments 1
Y Organizer Y
Outside
× Hard Shell ×
N Rain-fly N
N Water Bottle Holder 1
Y Water Resistant Y
Material
630-denier 100% nylon, 200-denier 100% recycled polyester800x600D lightweight waterproof nylon-polyester blend

OPPOSETHIS Ark - 2020

Front facing view of the OPPOSETHIS Ark - 2020
Capacity25 L
Weight0.95 kg
Dimensions49×30×17 cm
Airline fit92%
Price$244

Key differences between the Patagonia Tres Backpack 25L and OPPOSETHIS Ark - 2020

Both have: sternum strap, built-in organizer, water resistant.

Which airlines take each bag as a carry-on

We checked both bags against the carry-on size limits of 189 airlines. 172 accept both. 2 accept only the Patagonia Tres Backpack 25L, and 1 accept only the OPPOSETHIS Ark - 2020.

Only the Patagonia Tres Backpack 25L fits

Regional Express, Virgin Australia.

Only the OPPOSETHIS Ark - 2020 fits

Air Niugini.

Patagonia Tres Backpack 25L vs. OPPOSETHIS Ark - 2020: which should you pack?

The Patagonia Tres Backpack 25L carries the same capacity as the OPPOSETHIS Ark - 2020 (25L vs. 25L), while the Patagonia Tres Backpack 25L is the lighter pack at 0.9kg (vs. 0.95kg). For carry-on flexibility, the Patagonia Tres Backpack 25L fits 92% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Patagonia Tres Backpack 25L; if you want to travel lighter, the Patagonia Tres Backpack 25L is the better call.