Cotopaxi Allpa 28 vs. Gregory Border 40

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

Cotopaxi Allpa 28

Front facing view of the Cotopaxi Allpa 28
Capacity28 L
Weight1 kg
Dimensions48×30×23 cm
Airline fit73%
Price$200

Feature by feature

Cotopaxi Allpa 28FeatureGregory Border 40
Storage
N Compression N
None Expanded Capacity None
1 Opening 1
side Passport top
Y Passthrough N
Carry
hideable Backpack hideable
hideable Hip Belt hideable
Y Sternum Strap Y
Inside
15in Laptop 15in
4 Main Compartments 3
N Organizer N
Outside
× Hard Shell ×
N Rain-fly N
1, side Water Bottle Holder 1, side
Y Water Resistant Y
Material
100% recycled 840D TPU-coated nylonPVC-Free Coated 210D High Density 66 Nylon PFAS free

Gregory Border 40

Front facing view of the Gregory Border 40
Capacity40 L
Weight1.3 kg
Dimensions56×36×23 cm
Airline fit45%
Price$200

Key differences between the Cotopaxi Allpa 28 and Gregory Border 40

Both have: backpack straps, hip belt, 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. 85 accept both. 53 accept only the Cotopaxi Allpa 28, and 0 accept only the Gregory Border 40.

Only the Cotopaxi Allpa 28 fits

Aer Lingus, Aeroflot, Aerolineas Argentinas, Aeromexico, Air Canada, Air Caraibes, Air France, Air India, Air Mauritius, All Nipon Airways, ANA, Austrian, Azerbaijan Airlines, Boliviana de Aviacion, Brussels Airlines, Caribbean Airlines, Cayman Airways, Croatia Air, Czech Airlines, Ethiopian Airlines, Etihad Airways, Eurowings, Fiji Airways, Flair Air, Gol Linhas Aereas, Iberia, Indigo, Interjet, Iran Air, Japan Airlines, Jet Airways, Kenya Airways, KLM, LATAM , LOT Polish, Lufthansa, Mahan Air, Mesa Airlines, Norwegian, Oman Air, Peach, Porter Airlines, Qatar Airways, Regional Express, Royal Jordanian, SAS Scandinavian, Scoot, Sky Airlines, Swiss Int'l Air Lines, Tiger Airways, Turkish Airlines, Virgin Australia, WestJet.

Cotopaxi Allpa 28 vs. Gregory Border 40: which should you pack?

The Gregory Border 40 carries 12L more than the Cotopaxi Allpa 28 (28L vs. 40L), while the Cotopaxi Allpa 28 is the lighter pack at 1kg (vs. 1.3kg). For carry-on flexibility, the Cotopaxi Allpa 28 fits 73% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Gregory Border 40; if you want to travel lighter, the Cotopaxi Allpa 28 is the better call.