Speedo Men's UPF 50+ Control The Cool Short Sleeve Rashguard Swim Tee 51% Polyester, 49% Cool Nylon Imported Loose fit rashguard styling for more comfortable, forgiving fit with wicking technology Control the cool performance fabric developed to reduce body temperature during activities Trademarked "speedry" fabric treatment for quicker drying and long lasting durability Uv block the burn offers tighter knit fabric for higher level of sun protection Made by speedo, the world's #1 swim brand