Mobile CoolingA(R)&';s short sleeve polo with zippered closure is the ideal shirt for work or play. Stylish enough for the office and rugged enough for work and other outdoor pursuits. Made with DriComfort GEO 365 mineral infused fabric pulls heat and moisture form the body and dries 4x faster than traditional knits. No harsh chemicals or topical treatments that might wash out. UPF50 sun block offers all day sun protection. Vented sides and back for added comfort. OdorsheerA(R) odor control keeps odor causing microbes at bay. Shirt Features: a GEO 365 mineral infused fabric is a permanent wicking, fast drying and temperature regulating technology imbedded into shirt fibersa Powerful SunsheerA(R) tech provides UPF 50 defense against the suns harmful UV raysa OdorsheerA(R) technology guards against odor causing microbes improving freshnessa SweatsheerA(R) moisture-wicking features promote rapid evaporation and dries 4x faster than traditional knitsa Short Sleeve Collared Design with Zipper Closure.a Flat-lock seams prevent chafing and rubbinga 1/4 zip designa 92% Recycled Polyester 8% Spandex Outera 91% Recycled Polyester 9 % Spandex Contrasta Mens sizes: SM-4XL (colors: Black, Navy)