You close this hiking backpack with a roll top. The black colour looks quite neat and it has a volume of 20 litres.
From Secret Sales
Trespass Mens Gentoo DLX Rolltop Waterproof Walking Backpack - Black - One Size
DLX Sport
Gentoo 20 Litre Waterproof Roll Top Backpack
Trekkinn
Dlx Gentoo 20l Backpack Black,Grey