Description The  ear hook rope is made of silicone, which provides a comfortable fit, doesn't soak up sweat, stink or fray. It is soft, durable, and washable. And it is anti-slip, being made to keep a tight grip on your glasses so you can have more active moments in life. Fits most kids and adult size glasses or sunglasses. Feature - Color: Black. - Material: Silicone. - Size: 17.0x 4.5 x 1.0cm(LxWxH). - One size fits most people. Fits standard-size frames. - Reduces slippage and prevents loosing glasses from face. - silicone provides a comfortable fit, doesn't soak up sweat, stink or fray.Soft, durable, washable. - Anti-slip: Never lose your glasses or sunglasses again. Our special silicone grips are made to keep a tight grip on your glasses so you can have more active moments in life. - Stretchy: Fits most kids and adult size glasses or sunglasses. One size fits most people Fits standard-size frames |Reduces slippage and prevents loosing glasses from face |Soft silicone provides a comfortable fit, doesn't soak up sweat, stink or fray Soft, durable, washable