Chums Safety universal fit breakaway safety eyewear retainer. Field tested retainers with a reconnecting breakaway for safety. Chums' patented Universal Fit tips are molded directly to the cord and will accommodate a wide variety of eyeglass frames. Nylon 3 millimeters cord utilizes perlon climbing rope construction giving it strength, durability and a style. Adjustable slider bead for superb fit. Durable nylon perlon cord construction. Field tested sunglass, eyewear and eyeglass cord. Black color.