Men's Black She OGIO Endurance Men's Blacktop Stealth Full-Zip Jacket offers plenty of versatility to work in all types of weather conditions. Wear the jacket as the outer layer of workout apparel on a mild spring day. Layer the lightweight jacket under a heavy winter coat to fend of frigid temperatures. Ventilating perforation located on the back of the jacket encourages the circulation of air that complements the stay-cool wicking technology applied to the mostly polyester fabric. 61% Polyester & 39% Cotton