10oz, 100% cotton Canyon Cloth canvas, Ribbed cuff and hem, brushed tricot inside upper body panel with 3oz polyfill for warmth and ease of movement. Quilted nylon inside lower body panel with 3oz polyfill. POWER MOVE features include Flex Action back, Flex Action underarm gussets, and flex Action articulated elbows. Heavy duty, YKK metal zipper with easy grab zipper pull.