You close this hiking backpack with a buckle and lid. One of the materials used to make this bag is polyester and it has a practical inner pocket for smaller items.
From Amazon
Vaude Jura 18 Backpack15-19L - Blue Sapphire, One Size
Trekkinn
Vaude Tents Jura 18l Backpack Blue
OnBuy
VAUDE Unisex Jura 18 Backpacks15-19L