KS Ultralight KS27 vs. Matador Freerain22 Waterproof Packable Backpack

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

KS Ultralight KS27

Front facing view of the KS Ultralight KS27
Capacity27 L
Weight0.3 kg
Dimensions55×28×16 cm
Airline fit87%
Price$130

Feature by feature

KS Ultralight KS27FeatureMatador Freerain22 Waterproof Packable Backpack
Storage
2 Compression 2
None Expanded Capacity None
0 Opening 2
top Passport front
N Passthrough N
Carry
Y Backpack Y
removable Hip Belt removable
removable Sternum Strap removable
Inside
N Laptop N
2 Main Compartments 2
N Organizer N
Outside
× Hard Shell ×
N Rain-fly N
2, side Water Bottle Holder 2, side
Y Water Resistant Y
Material
X-pac VX 07 YKK "waterproof zip"70D Robic® nylon with UHMWPE ripstop, PFAS free

Matador Freerain22 Waterproof Packable Backpack

Front facing view of the Matador Freerain22 Waterproof Packable Backpack
Capacity22 L
Weight0.3 kg
Dimensions50×27×18 cm
Airline fit92%
Price$100

Key differences between the KS Ultralight KS27 and Matador Freerain22 Waterproof Packable Backpack

Both have: compression straps, backpack straps, hip belt, sternum strap, 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. 164 accept both. 0 accept only the KS Ultralight KS27, and 10 accept only the Matador Freerain22 Waterproof Packable Backpack.

Only the Matador Freerain22 Waterproof Packable Backpack fits

Air Niugini, Belavia, Etihad Airways, Liat Airlines, Oman Air, Qatar Airways, Royal Jordanian, Scoot, Tiger Airways, WestJet.

KS Ultralight KS27 vs. Matador Freerain22 Waterproof Packable Backpack: which should you pack?

The KS Ultralight KS27 carries 5L more than the Matador Freerain22 Waterproof Packable Backpack (27L vs. 22L), while the KS Ultralight KS27 is the lighter pack at 0.3kg (vs. 0.3kg). For carry-on flexibility, the Matador Freerain22 Waterproof Packable Backpack fits 92% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the KS Ultralight KS27; if you want to travel lighter, the KS Ultralight KS27 is the better call.