This product is made of 210T Ripstop Polyester with a 2.5 Liter capacity and a roll-top closure that clips onto belts or bags. A key feature is the ability to use a touch screen device without removing it from the inside pocket. It floats if dropped in water, making it perfect for keeping contents dry and safe. The approximate size is 7" W x 11 ½" H x 4 ¼" D, and available colors include Clear with Black, Light Blue, Lime Green, Red, Royal Blue, or White.