This Diaper Backpack is long-lasting and durable, thanks to the strength and toughness of denier nylon - nylon reinforced bottom, nylon lined inside, nylon lined pockets, nylon changing pad. Won't tear, crack or yellow. Four pockets - one zippered, fully across one side and three open bottle pockets on the other side. Can be used as a single-strap sling, or the sling can be unzipped for regular backpack use. 100% cotton, designer fabric. Machine washable. Measures 14 1/2"W x 6"D x 15"H.