600D polyester with latex rubber backing. Side panels with built-in speakers connects to amplifier in front pocket which has MP3 player compatibility - connects to your mobile music device (3 x AA batteries required not included). Adjustable neck strap and side tie strings. Detachable bottle opener. Rubber beverage holder pocket. Multiple front accessory slip pockets. Dimensions: 60cm x 80cm. Decoration Area: Front: 150mm W x 100mm H. Colour: blackcharcoal