Thank you for viewing this product page. [Contents] Eyeglass stoppers, 2 colors, 4 pieces [Size] 37mm x 9mm [Colors] Brown (1 pair, 2 pieces) White (1 pair, 2 pieces) [Material] Silicone These eyeglass stoppers prevent your glasses from slipping by simply threading them onto the frame. The soft silicone material is comfortable to wear and prevents slipping even when you sweat. For easier installation, please try soaking them in hot water for about 8-10 seconds before use.