This thermo-regulating longline top is fabricated with brrr° cooling technology and hyper-wicking fabric that keeps the skin cool and dry while you're sweating on the trail. brrr° technology has three unique cooling effects that combine to immediately and continually reduce the temperature of your skin. More specifically, this Triple Chill Effect combines the power of cooling minerals, active wicking and rapid drying to enhance dryness and comfort while also working to reduce temperature.