Adjustable Glasses Strap - No Tail Eyeglass Straps,

There is a moveable square toggle and a small ring on the cord, which allow the strap to be adjusted according to your head size and effectively prevents your glasses slipping down,can be adjusted according to your preference.
This eyewear retainer will hold your head neither be too tight or too loose for elasticity, as as easy to take quickly.
With environment friendly silicone material and elastic nylon material, it is odorless and non-toxic, soft and safe enough for your head wearing,
One size fit all, perfect for outdoor sports activities
Portable and easy to put into the glasses case

Colour: Black
Material: Silicone + elastic band

Package Contents:
6 * Anti- rope for glasses

Only the above package content, other products are not included.
Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.