Callaway Men's Golf Performance Light Weight Pants 87% Polyester, 13% Spandex Imported Opti-Dri: transfers moisture away from the body to aid in evaporation OptiShield: create a layer of protection from the sun's harmful ways, UPF 50 OptiStretch: interwoven layers of Spandex to ensure maximum range of motion so the garment moves with the golf swing Machine Wash Cold, Tumble Dry