The Men's UA Iso Chill Fusion Hoodie was literally designed to help you "chill." The fit is next-to-skin, without the squeeze. It has built in UPF 50+ sun protection. The Iso-Chill fabric helps disperse body heat, making it feel cool to the touch. Hybridized mesh paneling and dropped hem with side vent provides ultimate breathability. This hoodie is 100% polyester and 100% must-have.