The Kids Rash Shorts are great as swimwear and for playing outdoors. The fabric is quick-drying, high in stretch and has an UPF50+ treatment, so your little ones are comfortable and protected out in the sun. UPF50+ - the fabric has a sun protection factor treatment of 50+Fabric composition - made of 88% polyester and 12% elastaneQuick drying - ideal to wear in and out of the waterStretch - soft and comfortable to wearFlat seams - combined with the close fit prevents chafing, perfect to wear under a wetsuit or as part of a swimming costume