Waymark Dark Sky vs. Tortuga Outbreaker Daypack

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

Waymark Dark Sky

Front facing view of the Waymark Dark Sky
Capacity16 L
Weight0.4 kg
Dimensions41×27×14 cm
Airline fit96%
Price$115

Feature by feature

Waymark Dark SkyFeatureTortuga Outbreaker Daypack
Storage
N Compression N
None Expanded Capacity None
0 Opening 0
N Passport front
N Passthrough N
Carry
Y Backpack Y
N Hip Belt N
Y Sternum Strap removable
Inside
N Laptop 15in
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
Recycled RBC350 Ripstop Polyester, RBC600, RBC200 fabricsX-Pac waterproof sailcloth

Tortuga Outbreaker Daypack

Front facing view of the Tortuga Outbreaker Daypack
Capacity21 L
Weight0.5 kg
Dimensions43×28×17 cm
Airline fit96%
Price$125

Key differences between the Waymark Dark Sky and Tortuga Outbreaker Daypack

Both have: backpack straps, 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. 181 accept both. Every airline that takes one takes the other.

Waymark Dark Sky vs. Tortuga Outbreaker Daypack: which should you pack?

The Tortuga Outbreaker Daypack carries 5L more than the Waymark Dark Sky (16L vs. 21L), while the Waymark Dark Sky is the lighter pack at 0.4kg (vs. 0.5kg). For carry-on flexibility, the Waymark Dark Sky fits 96% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Tortuga Outbreaker Daypack; if you want to travel lighter, the Waymark Dark Sky is the better call.