The Mens Long Sleeve Rash Vest can be worn for swimming, under a wetsuit or when you spend time in the sun. It’s made of soft, stretchy fabric with UPF 50+ treatment and flat seams - a lightweight sun protection top. Fabric composition - made of 82% nylon and 18% elastane UPF 50+ - the fabric has a sun protection treatment of 50+ Quick drying - suitable to wear in and out of the water Flat seams - combined with a close fit to prevent chafing, perfect to wear under a wetsuit or as part of a swimming costume Comfort - soft, stretchy fabric feels comfortable on the skin (Ref: 024865)