The Racer Bikini Bottom is preferred by female lifeguard worldwide for the superior comfort and fit, especially in the water. Made with 100% Chlorine Block Polyester these 2 layer bottoms provide 0% transparency as well as an enhanced security drawcord, retro waist and moderate coverage in back. 100% Chlorine Block Polyester Security Drawcord Double Lined 0% Transparency Made in USA NWOT