ANLENG Classic Eyewear Retainer Sunglasses Sports Holder Strap --2 Pack-- Simple and practical, suitable for 4-9mm width eyeglasses legs. Highly quality and soft sleeve can be sleeved in the mirror legs. It can firmly entangle the mirror legs, and not easy to fall off. non slip, comfortable and flexible. Suitable for myopia, reading glasses, sunglasses; can be used for outdoor sports, play ball, or out of travel. Simply connects to your arms of the glasses for s secure fit.