Eyeglasses anti-slip strap & ear lock hook set for both men & women. They are made from silicone, super soft and light, comfortable for wearing. The strap can be stretched. This set can keep glasses from slipping during sports and activities, extremely durable and reusable, easily adjustable to fit your face comfortably. How to use the temple tips? Stick the frame temple through the hole of the silicone temple tip. Slide silicone temple tip 1cm up from the end of the frame temple. Try frame on & adjust silicone temple tip up or down to fit comfortable behind your ear.