United by Blue (R)evolution 25L Convertible Carryall vs. Tortuga Outbreaker Daypack

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

United by Blue (R)evolution 25L Convertible Carryall

Capacity25 L
Weight0 kg
Dimensions39×34×13 cm
Airline fit96%
Price$120

Feature by feature

United by Blue (R)evolution 25L Convertible CarryallFeatureTortuga Outbreaker Daypack
Storage
N Compression N
None Expanded Capacity None
0 Opening 0
front Passport front
N Passthrough N
Carry
hideable Backpack Y
N Hip Belt N
removable Sternum Strap removable
Inside
15in 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
X-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 United by Blue (R)evolution 25L Convertible Carryall and Tortuga Outbreaker Daypack

Both have: passport pocket, sternum strap, laptop sleeve, 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. 179 accept both. 2 accept only the United by Blue (R)evolution 25L Convertible Carryall, and 2 accept only the Tortuga Outbreaker Daypack.

Only the United by Blue (R)evolution 25L Convertible Carryall fits

VivaColombia, Volaris.

Only the Tortuga Outbreaker Daypack fits

Air Niugini, Great Lakes Airlines.

United by Blue (R)evolution 25L Convertible Carryall vs. Tortuga Outbreaker Daypack: which should you pack?

The United by Blue (R)evolution 25L Convertible Carryall carries 4L more than the Tortuga Outbreaker Daypack (25L vs. 21L), and the two are closely matched on weight. For carry-on flexibility, the United by Blue (R)evolution 25L Convertible Carryall fits 96% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the United by Blue (R)evolution 25L Convertible Carryall; if you want to travel lighter, the Tortuga Outbreaker Daypack is the better call.