This waterproof ultra-lightweight 18-liter pack comes with its own stuff sack, and when it&';s stowed, it&';s smaller than a can of beer (or a small coffee, if that&';s more your thing). Carry it for side trips from base camp, or keep it inside your overnight pack to keep your camera dry during a downpour. Fabric : 100% polyester 40D ripstop PU coating Dimensions : Dimensions / Rolled: 17" x 9" x 7" / 43 cm x 22 cm x 17 cm Volume: 1071 cu. in. / 18L Weight : 4.1oz / 118g Avg. Weight for size One Size