Natuworld Pack of 6 Sport Safety Anti-slide Thickness Sunglasses Universal Fit Rope Eyewear Retainer Strap Eyeglasses Cord Lanyard Holder Glasses Accessories Random Colors for shipping Made of Silicone ,Skidproof Size: 22*6*1.2 cm Perfect to keep your sunglasses in place everywhere you go. Fit most styles of eyewear with rubber connectors. Anti-slide and thickness design for more durable