Fjallraven Rucksack No. 21 Medium vs. Greenroom136 Genesis

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 MediumFeatureGreenroom136 Genesis
Storage
N Compression Y
None Expanded Capacity None
3 Opening 3
N Passport Y
N Passthrough N
Carry
Y Backpack Y
N Hip Belt N
Y Sternum Strap Y
Inside
15in Laptop 17in
1 Main Compartments 1
N Organizer N
Outside
× Hard Shell ×
N Rain-fly N
2 Water Bottle Holder 2
Y Water Resistant Y
Material
G-1000® HeavyDuty Eco: 65% polyester, 35% cotton100% genuine, 1000 denier urethane coated Cordura nylon fabric for outer shell. 100% genuine, 420 denier urethane coated Oxford nylon fabric for inner shell.

Greenroom136 Genesis

Front facing view of the Greenroom136 Genesis
Capacity20 L
Weight1.8 kg
Dimensions44×32×14 cm
Airline fit95%
Price$156

Key differences between the Fjallraven Rucksack No. 21 Medium and Greenroom136 Genesis

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. 179 accept both. 2 accept only the Fjallraven Rucksack No. 21 Medium, and 0 accept only the Greenroom136 Genesis.

Only the Fjallraven Rucksack No. 21 Medium fits

Air Niugini, Great Lakes Airlines.

Fjallraven Rucksack No. 21 Medium vs. Greenroom136 Genesis: which should you pack?

The Fjallraven Rucksack No. 21 Medium carries the same capacity as the Greenroom136 Genesis (20L vs. 20L), while the Fjallraven Rucksack No. 21 Medium is the lighter pack at 0.96kg (vs. 1.8kg). 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 Fjallraven Rucksack No. 21 Medium; if you want to travel lighter, the Fjallraven Rucksack No. 21 Medium is the better call.