Set of 8 (4 pairs) ※※※ Please let us know if you have any specific color or style preferences. 【Securely Fix Your Glasses!】 These anti-slip holders reduce slippage and prevent your glasses from falling off your ears. They solve the problems of glasses constantly sliding down your nose, wobbling during exercise, and the discomfort of wearing them for long periods! By securing your glasses, these are the perfect item to prevent them from slipping. They eliminate discomfort and danger when your glasses slip during sports or work, improving exercise and work efficiency. 【Discreet & Comfortable】 You can only see the hooks of the glasses from the back, and you can use them as many times as you like. These are discreet glasses locks that hide behind your ears. And, using this type of glasses retainer, the holder will not discolor or deform. Also, because they are made of soft and elastic material, you don't have to worry about your ears hurting. The slightly curved design is more ergonomic and comfortable even when worn for long periods. 【Wide Range of Uses】 They securely hold your glasses, so they won't fall off even during vigorous exercise. You can use them for both everyday life and sports, such as tennis, soccer, baseball, golf, cycling, running, mountain climbing, and skiing. And, in normal cases, they can be used for about 2 months in summer and 3-4 months in winter. We recommend replacing them about once a month if you sweat a lot.