Fox Head Men's Soleed Short Sleeve Tech Tee 85% Polyester/15% Cotton Technical Tshirt Imported Machine Wash Skin temperature reduction keeps you up to 6 degrees cooler Dries 4 times faster than cotton Permanent performance- dri release is built in, won't wash out or wear out. Ultraviolet protection factor rating of 22 Built in fresh guard won't retain body order and is chemical free