Our underwire tie-front bikini top is tied for first place for the best beach style. Bra sized molded cupLonglineTied keyhole overlayJ-hook multi way closure 82% Nylon/18% spandexFabric provides UPF 50 UV protection. .Sizes 36DD-46GHand wash with mild soap. Roll suit in towel & squeeze out excess water. Dry flat; avoid washers & dryers.Imported Close Back Details “UPF” stands for Ultraviolet Protection Factor and it measures the Ultraviolet radiation or “UV” protection from the sun provided by a fabric. (Similar to the SPF rating system used for sunscreens.) Our Swimsuits For All styles with UV sun protection have a rating of UPF 50 (the highest possible rating) which means only 1/50th of the sun's UV rays can pass through, and it blocks 98% of UV rays.