Doestyle Classic Neoprene Eyewear Retainer, Sunglasses Safety Holder Eyewear Retainer Sunglasses Strap Simple and practical, suitable for 4-9mm width eyeglasses legs Highly quality and soft sleeve can be sleeved in the mirror legs. Suitable for myopia, reading glasses, sunglasses; can be used for outdoor sports, play ball, or out of travel. Adjustable for your added protection and comfort, Water friendly, quick drying retainer Ends tightly grip your frames, so while you may lose yourself in your favorite activity, your glasses will remain securely strapped to your head