420D diamond weave ripstop polyester with PVC backing and 600D polyester with latex rubber backing. Huge zippered insulated main cooler compartment with protective baseboard. Heat sealed leak-proof PEVA Lining. Pull tab and Velcro lid opening allows quick access to main compartment. Front zippered pocket with built-in speakers and amplifier with MP3 player compatibility – Connects to your mobile music device (3 x AA batteries required not included).Top lid slip in pocket with Velcro closure. Two reinforced moulded rubber side carry handles. Detachable/adjustable padded shoulder strap. Heavy duty zippers and accessories. Rubber feet for added protection.