Description: A shut slider to adjust the length of strap enabling it to be worn around the neck or against the head. An effective way to keep your valuable eyewear secure. This adjustable strap will fit many styles of eyewear. Freely adjustable length. Great for reading glasses, sunglasses and prescription glasses. Specification: Material: Nylon Length: Approx. 50cm/20inch Diameter: Approx. 0.8cm/0.3inch Color: random Package Includes: 1 Piece Sunglasses Strap Cord