Fjallraven Rucksack No. 21 Medium vs. Patagonia Arbor Lid Pack 28L

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

Fjallraven Rucksack No. 21 Medium

Front facing view of the Fjallraven Rucksack No. 21 Medium
Capacity20 L
Weight0.96 kg
Dimensions44×28×13 cm
Airline fit96%
Price$180

Feature by feature

Fjallraven Rucksack No. 21 MediumFeaturePatagonia Arbor Lid Pack 28L
Storage
N Compression N
None Expanded Capacity None
3 Opening 3
N Passport N
N Passthrough N
Carry
Y Backpack Y
N Hip Belt N
Y Sternum Strap Y
Inside
15in Laptop 15in
1 Main Compartments 1
N Organizer N
Outside
× Hard Shell ×
N Rain-fly N
2 Water Bottle Holder N
Y Water Resistant Y
Material
G-1000® HeavyDuty Eco: 65% polyester, 35% cotton600-denier 100% recycled polyester, 00-denier 100% recycled polyester

Patagonia Arbor Lid Pack 28L

Front facing view of the Patagonia Arbor Lid Pack 28L
Capacity28 L
Weight0.52 kg
Dimensions49×27×13 cm
Airline fit92%
Price$101

Key differences between the Fjallraven Rucksack No. 21 Medium and Patagonia Arbor Lid Pack 28L

Both have: backpack straps, 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. 7 accept only the Fjallraven Rucksack No. 21 Medium, and 0 accept only the Patagonia Arbor Lid Pack 28L.

Only the Fjallraven Rucksack No. 21 Medium fits

Air Tahiti, American Eagle, easyJet, Gulf Air, Ravn Alaska, Regional Express, Virgin Australia.

Fjallraven Rucksack No. 21 Medium vs. Patagonia Arbor Lid Pack 28L: which should you pack?

The Patagonia Arbor Lid Pack 28L carries 8L more than the Fjallraven Rucksack No. 21 Medium (20L vs. 28L), while the Patagonia Arbor Lid Pack 28L is the lighter pack at 0.52kg (vs. 0.96kg). For carry-on flexibility, the Fjallraven Rucksack No. 21 Medium fits 96% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Patagonia Arbor Lid Pack 28L; if you want to travel lighter, the Patagonia Arbor Lid Pack 28L is the better call.