UA Siro fabric gives greater stretch & recovery, ultra-soft feel & more breathable performance .Material wicks sweat & dries really fast .Anti-odor technology prevents the growth of odor-causing microbes .Raglan sleeves .Flatlock seams eliminate chafing .Fixed 3-piece hood with scuba collar for enhanced coverage .Hidden bottom hem cinch .Rolled forward side seams & back yoke detail .Heathered twist effect on hood & body with solid side panels .