It's ultra comfortable, very soft on the ears and nicely keep glasses on during sports or rough boy play. It is flexible enough for you to slide glasses off you.Made of neoprene, quick drying and keeps you from losing the shades/glasses in a sudden burst of surf at the beach. Perfect for the water/amusement parks, beach or anywhere you're afraid you might lose the glasses.It fits most eyewear to prevent from slipping and securely retain on head, neck or even arms. Recommend for anybody who wants to keep glasses right on and stay put safely and gracefully.