Revolutionary coldblack® technology reflects IR and heat rays, so even dark color don"t get as hot. Minimum UPF 30+ sun protection to block out UV-A and UV-B rays. Ultra-light, smooth HeatGear® fabric delivers performance without the weight. Underarm mesh panels provide strategic ventilation. Signature Moisture Transport System wicks sweat away from the body. Anti-odor technology prevents the growth of odor causing microbes. Smooth flatlock seams allow a full range of motion without chafing. Graphics and logos provide 360° reflectivity for safer low-light runs. Embossed pattern on some colors. 3.8 oz. Polyester. Imported.