10 Pack Silicone Elastic Cord Retainer Strap Band for Sports Eyeglass and Sunglass Eyewear Holder Glasses Head Floater Anti-Slip Rope String Men Women Kids

Material: Made of flexible silicone material, no allergies, durable and comfortable to use, Size: 21cm/ 8.3 inches in total length, hole size is 0.9 x 0.2 cm, elastic design allows you to stretch the strap up to 40 cm, Suitable: Fit most sunglasses frames, safe, waterproof, soft, comfortable, anti-slip, fast drying, adjustable, simple and practical design, easy to use, Function: These eyeglasses strap reduce eyewear slippage and prevent loosing glasses from face. Keep your glasses safe when you doing indoor or outdoor sports or activities