What you will GetPackage included 2 pcs black sunglasses straps and 4 pcs black ear hooks, perfect eyewear retention system for sports, hiking, fishing, biking or other outdoor activities. .Premium MaterialThese eyeglass cord are made of coated stainless steel cable, and with waterproof silicone connector, tough but soft, not easy to fray or break, can serve you for long time. .silicone .Adjustable FlexibleAdjustable length of the sports glasses strap can be extend from 20.5~29.5cm/8.1~11.6inch, can be adjusted to fit your head perfectly, universal eyeglass cord for women men. .Multi-FunctionWhen you are not using sunglasses, glasses neck cord can keeps your glasses secure around your neck, which not only never worry about losing your glasses. If you wan to hold your glasses more safe, the ear hooks can help you .Wide ApplicationThe anti slip glasses strap fit most glasses frames, can work well with prescription glasses, sunglasses, reading glasses, safety glasses, etc., especially plays an important role in sports and outdoor activities, etc. .