NEW TYR Guard Ringback polyester swimsuit style offers an adjustable ring that slides into place for flawless fit and comfort. Inspired by the Microback swimsuit with thin straps and a more revealing cut for a sleek, stylish and sexy look. Innovative and comfortable cut eliminates traditional tan lines. Elevated leg line for superior freedom of motion and comfort. The Durafast polyester swimsuit fabric is made of 53% polyester / 47% polyester PBT.