Cool, comfortable, and delivering UPF 40+ performance, this is advanced arm protection from coastal sun. The highly breathable polyester material wicks moisture, is comfortable next to the skin, and blocks harmful rays. Four-way stretch provides light compression and maintains form and shape when wet. Extended length and thumbhole construction at the cuffs provide critical back-of-hand coverage. The elastic upper with an engineered silicone grip holds the sleeve comfortably in place. Just the right amount of thermal protection to cut a chill morning wind, and light enough to wear for all day sun protection.