REI Co-op Trail Pack 25 vs. Gregory Nano 24L

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

REI Co-op Trail Pack 25

Front facing view of the REI Co-op Trail Pack 25
Capacity25 L
Weight0.8 kg
Dimensions46×33×20 cm
Airline fit94%
Price$100

Feature by feature

REI Co-op Trail Pack 25FeatureGregory Nano 24L
Storage
2 Compression 2
None Expanded Capacity None
0 Opening 0
top Passport front
N Passthrough N
Carry
Y Backpack Y
removable Hip Belt removable
Y Sternum Strap Y
Inside
N Laptop N
3 Main Compartments 3
N Organizer N
Outside
× Hard Shell ×
Y Rain-fly N
2, side Water Bottle Holder 2, side
Y Water Resistant Y
Material
210-denier ripstop nylon210D High Density 40% Recycled Nylon / 450D 100% recycled Polyester with C0 DWR

Gregory Nano 24L

Front facing view of the Gregory Nano 24L
Capacity24 L
Weight0.6 kg
Dimensions53×28×23 cm
Airline fit70%
Price$100

Key differences between the REI Co-op Trail Pack 25 and Gregory Nano 24L

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. 132 accept both. 45 accept only the REI Co-op Trail Pack 25, and 1 accept only the Gregory Nano 24L.

Only the REI Co-op Trail Pack 25 fits

Air Baltic, Air China, Air Malta, Air Serbia, Air Seychelles, American Eagle, Asiana Airlines, ATA Airlines, Belavia, Blue Air, Bulgaria Air, China Eastern, easyJet, Emirates Airlines, Enter Air, Etihad Airways, flybe, Icelandair, InselAir, Juneyao Airlines, Liat Airlines, Luxair, Meridiana Fly, Nordwind Airlines, Oman Air, Pakistan International, Qatar Airways, Ravn Alaska, Regional Express, Royal Brunei Airlines, Royal Jordanian, Ryanair, S7, Shandong Airlines, Shenzhen Airlines, Sun Express, TAP Air Portugal, TAROM, Tianjin Airlines (A320 & E190), TUI, Ukraine International, VIM Airlines (Closed), Virgin Australia, Volotea, Xiamen.

Only the Gregory Nano 24L fits

Great Lakes Airlines.

REI Co-op Trail Pack 25 vs. Gregory Nano 24L: which should you pack?

The REI Co-op Trail Pack 25 carries 1L more than the Gregory Nano 24L (25L vs. 24L), while the Gregory Nano 24L is the lighter pack at 0.6kg (vs. 0.8kg). For carry-on flexibility, the REI Co-op Trail Pack 25 fits 94% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the REI Co-op Trail Pack 25; if you want to travel lighter, the Gregory Nano 24L is the better call.