Callaway Men's Big & Tall Golf Performance Light Ventilated Shorts 100% Polyester Imported Opti-Dri: transfers moisture away from the body to aid in evaporation OptiStretch: interwoven layers of Spandex to ensure maximum range of motion so the garment moves with the golf swing OptiVent: fabric allows for the garment to have maximum breath-ability Machine Wash Cold, Tumble Dry