DEAL FOR INVENTIVE SUMMER CLOTHING FROM COOLTAN TAN-THROUGH SHIRTS & SWIMWEARThe unique patent-pending fabric used in Cooltan tan-through shirts & swimwear is made with a special knitting technology that creates millions of tiny pores in the fabric. These pores allow approximately half of the sun`s light to pass through to approximately the same degree as a medium level sunscreen. Look great and safely tan through your swimsuit or sportshirt!