Size: These eyeglass cord is 60 cm/ 23.6 inches,a common size for many people.

Material:These eyeglass straps are made of nylon,soft and durable, , not easy to fray or break,can use for long time.

Polyamide

Adjustable: There is comes with adjustable and anti-slip design that can be slipped to meet your needs.

Advantages:Suitable for most frames, it can be used with sunglasses, reading glasses, and glasses.

Multiple Uses:Perfect for climing, swimming, riding, traveling, fishing, hiking and daily use.

nuoshen 4 Pack Glasses Cord 1x Microfiber Cleaning Cloth Eyeglasses Straps Eyeglasses Lanyard Glass Cord Retainer for Men Women