It is easy to use, fits most types of glasses and when worn, sits on the back of your head to provide additional stability for eyewear. Simply push the spectacle temples up into the strap until it sits comfortably against the head. This strap is made of premium materials, promising maximum strength and stretch while remaining soft, light, and naturally comfortable against your skin. Additionally, the tubes on the strap’s ends assist in keeping your spectacles in place by allowing them to hold your temples.