You close this hiking backpack with a buckle and lid. Since it only comes in blue, your colour choice is made very easy and it has a 35-litre volume.
From Alpine Trek
Fjällräven - Abisko Hike 35 - Walking backpack size 35 l - M/L, blue
Scandinavian Outdoor Store
Fjällräven Abisko Hike 35 M/L