KS Ultralight KS27 vs. ULA Equipment Ultra 36L Dragonfly

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 KS27FeatureULA Equipment Ultra 36L Dragonfly
Storage
2 Compression 2
None Expanded Capacity None
0 Opening 1
top Passport top
N Passthrough N
Carry
Y Backpack Y
removable Hip Belt removable
removable Sternum Strap removable
Inside
N Laptop 17in
2 Main Compartments 4
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"Challenge ULTRA, ULTRA TX, UltraStretch

ULA Equipment Ultra 36L Dragonfly

Front facing view of the ULA Equipment Ultra 36L Dragonfly
Capacity36 L
Weight0.9 kg
Dimensions52×30×19 cm
Airline fit88%
Price$320

Key differences between the KS Ultralight KS27 and ULA Equipment Ultra 36L Dragonfly

Both have: compression straps, passport pocket, 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. 163 accept both. 1 accept only the KS Ultralight KS27, and 4 accept only the ULA Equipment Ultra 36L Dragonfly.

Only the KS Ultralight KS27 fits

Great Lakes Airlines.

Only the ULA Equipment Ultra 36L Dragonfly fits

Liat Airlines, Scoot, Tiger Airways, WestJet.

KS Ultralight KS27 vs. ULA Equipment Ultra 36L Dragonfly: which should you pack?

The ULA Equipment Ultra 36L Dragonfly carries 9L more than the KS Ultralight KS27 (27L vs. 36L), while the KS Ultralight KS27 is the lighter pack at 0.3kg (vs. 0.9kg). For carry-on flexibility, the ULA Equipment Ultra 36L Dragonfly fits 88% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the ULA Equipment Ultra 36L Dragonfly; if you want to travel lighter, the KS Ultralight KS27 is the better call.