COOL OFF IN THE SIMMS SOLARFLEX CREWNECK SHIRT -PRINTSYou deserve a shirt that works as hard as you do. The Simms Solarflex features COR3(TM) which works to both keep you cool and fight odor. Be protected against the sun as well with a UPF-50 rating.FEATURES UPF-50 COR3(TM) sweat-wicking and odor fighting technologyTECH SPECS Fabric: 100% polyester Approx. Weight: 7 oz.