there is a space for your drinks bottle, a pocket for your mobile phone and a holder for your keys, so that your essentials are always close at hand. The exterior features a water-repellent coating and the straps are thick, soft and detachable for comfort and convenience. Features: water repellent coating. Adjustable strap. Interior zip pocket and key chain hook, details: dimensions:h:7 inches. D:3.1inches w: 10.6 inches. Weight:.7lbs. Volume:3.8 l. Outer body. Material:100% polyester. Lining material: polyester