UA CoolSwitch uses an exclusive coating on the inside that pulls heat away from your skin, so you actually feel cooler . Soft, incredibly lightweight construction delivers amazing breathability without sacrificing coverage . UPF 30+ sun protection. Material wicks sweat & dries really fast. 4-way stretch construction moves better in every direction . Anti-odor technology prevents the growth of odor-causing microbes . Shaped drop-tail hem delivers enhanced coverage without looking big & bulky. Reflective logos deliver greater visibility on low-light runs.