Specification: Material: Silicone Size: 2 X 0.2 X0.2 inches Weight: 2.4 g each pair Color: Black,Clear,Grey Package Contents: 9 Pairs of silicone glasses retainer Applicable people: Adults and Child PRODUCT CHRACTERIZATION: High-quality silicone made, soft and comfortable,no damage to the ear, or stick to your hairs.it can be used in all kinds of occasions. Different from other traditional glasses material, the silicone can wrap over the glasses legs,freeing you from the pressure of the glass and making you feel comfortable. USAGE TIPS: Designed to fit frame arms size up to 0.12~0.4 inch wide. If they are difficult to put on to your glasses, please heat for 30 seconds with hot water to loosen. You can also use some lubricant like hand cream to apply on your glasses frame arms. It can help you put on the silicone retainers to your glasses easier. Very easy to clean! Just use soap and water to wash. Leave it to dry naturally, or fasten the process with a hair dryer. REMINDER It is suggested to change a new one about every 3 months to prevent bacterial breeding. This product is consumable, so for your convenience, we have prepared for one package 9 pairs.