The Womens Rash Vest is a practical, lightweight sun-protection top. The fabric has an UPF50+ treatment and is quick drying with flat seams making it ideal for swimming and spending a day outdoors in the sun, or to wear under a wetsuit. UPF50+ - Fabric has a sun protection factor treatment of 50+ Quick Drying - Ideal for wear in and out of the water Stretch Fabric - Soft and comfortable Flat Seams - Combined with the close fit prevents chafing, perfect to wear under a wetsuit or as part of a swimming costume (Ref: 018520) Mountain Warehouse Women's Short Sleeved Quick Drying Stretchy UV Rash Vest in Navy Size: 6