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. Features & details 100% Polyester Imported Material wicks sweat & dries really fast