Flexible strings of thick black sports eyeglasses adjustable from the back for thick-stemmed -usually bone-frame glasses-.It is the model used especially for cyclists, water sports people, police, soldiers, special operations and close guards for sunglasses.With its flexible structure, it is suitabl..

Eyeglass threads, which are especially used for close reading glasses and prescription glasses, and can easily be inserted into almost any size spectacle stem by means of the silicone o-ring at the ends.There are 30 pieces of soot yarn in the package.Available in Black and Brown colors...