DURABLE GLASSES STRAP: retainers are made of high quality knitted cotton yarn material that prevents slipping and sliding of sunglasses COMFORTABLE AND SECURE: Stretchable and adjustable eye wear strap with slider beads for a snug fit around the head STYLISH STRAP: This eye glass retainer features solid color design that fits medium to extra-large eyewear frame MULTIPURPOSE RETAINER: Designed to be used during biking, hiking and skiing; sunglass strap prevents loss and breakage Washable; Made in the USA