Made from 100% polyester, this shirt is perfect for exercise, adventure, and daily wear. It's silky soft and designed to keep you cool in the summer and warm in the winter. It provides SolarBloc UPF 50+ UV sun protection, whether wet or dry. Additionally, PURE-tech cool-wicking technology keeps moisture away from the skin, while M-shield offers permanent odor control. fits true to size. Machine washable.