Nike Vapor Lite Running Backpack 63% nylon/37% polyester Imported Ultra-light 30D Cordura fabric for excellent durability Dual-zip main compartment and exterior zip pocket for secure storage Open-mesh shoulder straps and back panel for breathability Adjustable waist and sternum straps for a customized, stable fit. Dual side pockets for easy-access storage Reflective elements for enhanced visibility in low light. Dimensions: 18" H x 10" W x 6" D