Speedo Kid's UV Sun Shirt 80% Nylon, 20% Spandex 80% Nylon/20% Spandex Comfortable and lightweight sun shirt for pool, beach, or outdoor use UV50+ protection from the sun's harmful UVA and UVB rays Short sleeve design with pullover crew neck 80% Nylon/20% Spandex Made by Speedo, the world's #1 swim brand