Get into the game without losing your cool. Spacer Mesh panels on hat back allow cooling ventilation on even the warmest days. ^ 100 percent cotton in front two panels^ 100 percent polyester Spacer Mesh in mid and back panels^ Structured stretch fitItem Size: Available in S/M, M/L, L/XLImprint Area: Please contact Customer Service at 877-787-4564 for more information.