Aer Pro Pack 20L vs. Ministry of Supply Boston One

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

Aer Pro Pack 20L

by Aer
Front facing view of the Aer Pro Pack 20L
Capacity20 L
Weight1.1 kg
Dimensions45×31×14 cm
Airline fit95%
Price$180

Feature by feature

Aer Pro Pack 20LFeatureMinistry of Supply Boston One
Storage
N Compression N
None Expanded Capacity None
1 Opening 1
top Passport top
Y Passthrough Y
Carry
Y Backpack hideable
N Hip Belt N
Y Sternum Strap Y
Inside
16in Laptop 16in
4 Main Compartments 4
Y Organizer N
Outside
× Hard Shell ×
N Rain-fly N
2, side Water Bottle Holder 1, internal
Y Water Resistant Y
Material
840D CORDURA re/cor recycled nylon900D 100% polyester shell

Ministry of Supply Boston One

Front facing view of the Ministry of Supply Boston One
Capacity28 L
Weight1.1 kg
Dimensions47×30×20 cm
Airline fit93%
Price$250

Key differences between the Aer Pro Pack 20L and Ministry of Supply Boston One

Both have: passport pocket, luggage passthrough, sternum strap, laptop sleeve, water resistant.

Which airlines take each bag as a carry-on

We checked both bags against the carry-on size limits of 189 airlines. 174 accept both. 5 accept only the Aer Pro Pack 20L, and 1 accept only the Ministry of Supply Boston One.

Only the Aer Pro Pack 20L fits

Air Tahiti, American Eagle, easyJet, Gulf Air, Ravn Alaska.

Only the Ministry of Supply Boston One fits

Air Niugini.

Aer Pro Pack 20L vs. Ministry of Supply Boston One: which should you pack?

The Ministry of Supply Boston One carries 8L more than the Aer Pro Pack 20L (20L vs. 28L), while the Aer Pro Pack 20L is the lighter pack at 1.1kg (vs. 1.1kg). For carry-on flexibility, the Aer Pro Pack 20L fits 95% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Ministry of Supply Boston One; if you want to travel lighter, the Aer Pro Pack 20L is the better call.