It is a durable, storage backpack for school or the gym. Made with UA Storm technology that provides an element-resistant, highly waterproof and stain-resistant finish. Volume: 20 L Material: 100% polyester Dimensions: approx. 42 x 27.5 x 13 cm UA Storm technology - a highly durable finish that provides high water and stain resistance zippered main pocket and smaller front zippered valuables pocket side bottle pocket adjustable padded straps strap for easy carrying and handling logo on front urban, school backpacks