PLAY-KING Adjustable Eyewear Retainer, Universal Fit Rope Eyewear Retainer, Sport Unisex Sunglasses Retainer Holder Strap Sports safety eyewear glasses sunglasses holder eyeglasses neck cord string retainer strap has comfortable polyester braided cord, long lasting and fashion. keeps your glasses secure around your neck allowing sunglasses to be comfortably hung on your chest, or rest on top of your head. Ideal for fishing, biking, hiking, rock climbing or just enjoying the great outdoors.