Our eyewear strap is made from neoprene, when in use is positioned securely at the back of your head for added security when wearing your glasses during sporting activities, theme parks & more. This strap is a deluxe neoprene strap, it’s twin layered ( double thickness), Perfect For Use in Sporting Activities, Adult length - 16 Inches Long, Simply Twist Your Eyewear Temples Up Into The Strap Until Secure. We have over 12 years in specialising in eyewear accessories, these are designed with our knowledge & experience regarding sizing & quality. Double Thickness Sunglasses/Glasses Yellow Deluxe Twin Layered Neoprene Sports Head Band Strap