The Terra Cord eyewear retainer is available in a variety of styles and colors. Made of tough woven climbing rope that is colorfast, washable, and made in the USA. Each cord has different attachement endings to fit almost any size frame. The regular Terra Cord is available with max, middi and micro attachement ends. Terra Tite End has a uniquely designed attachment end that can stretch to fit most glasses. Terra Spec Cord ends have a silicone loop with a PVC sider ring to accommodate both large and small frames.