Croakies Arc Endless System Eyewear Retainer is made of high quality coated stainless steel that is durable, waterproof, and secures your eyewear through every day adventures. The lightweight and adjustable glasses string features an articulating cord that stays off the neck and collar. Each eye glasses string holder comes with one pair of XL terra ends and one pair of XXL terra ends for medium to large frames. This eye glass retainer is float kit compatible.