This fanny pack is constructed with durable 600 Denier Polyester. It has a zippered compartment that will hold cell phone, wallet, keys and more. Also features a universal water bottle holder and one 20 ounce water bottle is included that fits perfectly in the holder. A mesh compartment on the front that can hold additional items. The fanny pack measures 7.5 x 7 x 3 inches and the waist strap adjusts up to 42 inches.