CW-X Men's Long Sleeve Traxter Top 100% Polyester Imported Our dynamic compression System provides both muscle compression and flexibility in the same tight Directional stretch panels ensure range of motion in arms and shoulders Variable compression panels offer lower compression for freedom of motion and higher compression around Major muscle groups for support Patented cocona fabric Technology provides moisture-wicking , UV protection and odor-resistance 90% Polyester 10% Spandex