This Womens One Piece LIFEGUARD® Swimsuit is made with a Nylon and Lycra blend which is the most common material used for profeesional Lifeguard swimsuits. Thin shoulder straps go around to back to provide comfort and complete support. Front and Back fully Lined with Spandex material. Provides elasticity and comfort for a full-day wear. These are Officially Licensed Lifeguard® Swimsuits.