Upper: Synthetic. Insole: Air Cooled, Cushioned, Memory Foam. Outsole: Synthetic. Features a Composite Safety Toe, Heel Pillow, and Sketchers Slip-Ins Heel Panel for enhanced comfort and ease of use. Designed with Slip Resistant fabric technology for improved traction. Features a flat sole and a low cut design with a round toe style. Fastening is achieved through bungee lacing, a loop, and a slip-on design.