Exped Impulse 20 vs. Fjallraven Rucksack No. 21 Medium

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

Exped Impulse 20

Front facing view of the Exped Impulse 20
Capacity20 L
Weight0.88 kg
Dimensions52×27×18 cm
Airline fit89%
Price$139

Feature by feature

Exped Impulse 20FeatureFjallraven Rucksack No. 21 Medium
Storage
N Compression N
None Expanded Capacity None
3 Opening 3
Y Passport N
N Passthrough N
Carry
Y Backpack Y
removable Hip Belt N
Y Sternum Strap Y
Inside
N Laptop 15in
1 Main Compartments 1
N Organizer N
Outside
× Hard Shell ×
N Rain-fly N
2 Water Bottle Holder 2
Y Water Resistant Y
Material
Body: 210 D Robic HD ripstop nylon Carbonate PU, 2500 mm water column, Oeko-Tex 100 certified, PFC-freeG-1000® HeavyDuty Eco: 65% polyester, 35% cotton

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

Key differences between the Exped Impulse 20 and Fjallraven Rucksack No. 21 Medium

Both have: backpack straps, 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. 168 accept both. 0 accept only the Exped Impulse 20, and 13 accept only the Fjallraven Rucksack No. 21 Medium.

Only the Fjallraven Rucksack No. 21 Medium fits

Air Niugini, Air Tahiti, American Eagle, Belavia, easyJet, Etihad Airways, Gulf Air, Oman Air, Qatar Airways, Ravn Alaska, Regional Express, Royal Jordanian, Virgin Australia.

Exped Impulse 20 vs. Fjallraven Rucksack No. 21 Medium: which should you pack?

The Exped Impulse 20 carries the same capacity as the Fjallraven Rucksack No. 21 Medium (20L vs. 20L), while the Exped Impulse 20 is the lighter pack at 0.88kg (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 Exped Impulse 20; if you want to travel lighter, the Exped Impulse 20 is the better call.