ONME Adjustable Eyewear Retainer, Universal Fit Rope Eyewear Retainer, Sport Unisex Sunglass Retainer Holder Strap, Set of 6 (Black) 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. Adjustable toggle on cords ensures that straps will not easily fall off and are comfortable for all head sizes and shapes. Does not soak up sweat, get dirty, stink or fray and keeps your eyewear secure; Ideal for fishing, biking, hiking, rock climbing, snow skiing or just enjoying the great outdoors. Convenient 6 pack (No need to switch between frames). Fits many different kinds and brands of eyewear. The normal size of this eyewear retainer is 11.81in. Due to the great extensibility, you can strench it to 23.6in or more. Made of pure cutton material, you have no worry that it would suddenly break into pieces because of the huge pressure on it.