Made of quality material, safe, skin-friendly, soft, breathable, elastic and durable

It can be firmly connected to your glasses to prevent them form dropping while sports

Highly elastic, fits most people' head circumferences, and adjustable to change the length for proper fit

Suitable for most glasses with leg width within the range of 4 - 8 mm, easy to use

Suitable for sports like running, basketballs, etc

Alinory Glasses Strap 5pcs Sports Glasses Elastic Neck Strap Retainer Cord Chain Holder Lanyard for Eyeglasses