You close this hiking backpack with a zipper. The material of choice for this bag is polyester and it has a 22-litre volume.
From Blacks
AirZone Active 22L Daypack, Black - One Size
The product is available from £63.26 at international stores.
The Climbers Shop
Lowe Alpine AirZone Active 22 Backpack in Black
This product is also available at 1 unverified merchant.