OPPOSETHIS Invisible CARRY-ON backpack vs. Nordace Windsor

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

OPPOSETHIS Invisible CARRY-ON backpack

Front facing view of the OPPOSETHIS Invisible CARRY-ON backpack
Capacity21 L
Weight0.85 kg
Dimensions47×32×15 cm
Airline fit92%
Price$255

Feature by feature

OPPOSETHIS Invisible CARRY-ON backpackFeatureNordace Windsor
Storage
N Compression N
None Expanded Capacity None
1 Opening 1
Y Passport Y
N Passthrough Y
Carry
Y Backpack Y
N Hip Belt N
Y Sternum Strap Y
Inside
15in Laptop 15in
1 Main Compartments 1
Y Organizer Y
Outside
× Hard Shell ×
N Rain-fly N
N Water Bottle Holder N
Y Water Resistant Y
Material
800x600D lightweight waterproof nylon-polyester blend900D POLYESTER WITH PU LAYER

Nordace Windsor

Front facing view of the Nordace Windsor
Capacity22 L
Weight1.14 kg
Dimensions46×29×18 cm
Airline fit94%
Price$135

Key differences between the OPPOSETHIS Invisible CARRY-ON backpack and Nordace Windsor

Both have: passport pocket, backpack straps, sternum strap, laptop sleeve, 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. 174 accept both. 0 accept only the OPPOSETHIS Invisible CARRY-ON backpack, and 4 accept only the Nordace Windsor.

Only the Nordace Windsor fits

Air Niugini, American Eagle, easyJet, Ravn Alaska.

OPPOSETHIS Invisible CARRY-ON backpack vs. Nordace Windsor: which should you pack?

The Nordace Windsor carries 1L more than the OPPOSETHIS Invisible CARRY-ON backpack (21L vs. 22L), while the OPPOSETHIS Invisible CARRY-ON backpack is the lighter pack at 0.85kg (vs. 1.14kg). For carry-on flexibility, the Nordace Windsor fits 94% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Nordace Windsor; if you want to travel lighter, the OPPOSETHIS Invisible CARRY-ON backpack is the better call.