This 20L backpack features a polyester design, foldable to 20x16x3CM with a capacity of 20L. It has a waterproof fabric to keep items dry, and provides comfort with breathable mesh straps. An adjustable snap and two-way puller give a secure closure with smooth motion. Plus, the side hanging webbing allows for items, such as hiking poles, to be stored. Dimensions: 42x30x16CM.