This ProForce Backpack is made of polyester and includes an expandable zippered side panel to increase the inside compartment size. It has a Padded quilted backing and padded adjustable straps for added comfort. Inside compartment features a nylon duffel-style drawstring opening. Large front zippered pocket and additional zippered pocket on front flap. Screen printed design on front flap. Measures 12" long x 16" high x 5" deep, expands to 10" deep.