Our underwire tie-front bikini top is tied for first place for the best beach style. Bra sized molded cup. Longline. Tied keyhole overlay. J-hook multi way closure 82% Nylon/18% spandex. Fabric provides Upf 50 Uv protection. .Sizes 36DD-46GHand wash with mild soap. Roll suit in towel and squeeze out excess water. Dry flat avoid washers and 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.