Our shinkoda gl strap are especially useful for individuals who are wearing eyegl for their recreational activities and sports, or for persons with a job that requires some physical activity. With the help of this retainers, you can use it to hang your eyewear comfortably around your neck, chest, or on the upper part of your head. It prevents your gl from slipping or falling down and give you the kind of security that you are hoping to enjoy when wearing sungl or any eyewear. It is made from nylon & spandex material, which has a fine longevity, available in a range of colors, and suitable for people of all ages.