AllLife Black Nylon Camping Hiking Rucksack Bag Waterproof Rainproof Cover (Style 1) It is durable, portable and useful. Perfect for outdoor, travel, riding, climbing. Material: Nylon; Colour: Black Diameter: About 480-550mm/18.90-21.65 Package Included: 1 x Rucksack Bag Waterproof Rainproof Cover