Loose : Generous, more relaxed fit. Threadborne Siro fabric gives greater stretch & recovery, ultra-soft feel & more breathable performance Moisture Transport System wicks sweat & dries fast Anti-odor technology prevents the growth of odor-causing microbes Raglan sleeves & flatlock seams unlock mobility & eliminate chafing Fixed 3-piece hood with scuba collar for enhanced coverage Hidden bottom hem cinch Rolled forward side seams & back yoke detail