【Protect Ears】» Clip the mask on the neck or back of the head to reduce ear pressure and restraint. 【Tightness adjustment】» 3-level adjustable hook, comfortable extension buckle, suitable for various masks on the market. 【Increase comfort】» Super easy and convenient to wear，prevent earaches and facial marks caused by wearing masks for a long time. 【Suitable for adults and children】» It can solve the problem of wearing a face mask too tightly for large faces, and it can also solve the problem of thin faces and children wearing too loose masks and easily fall off. 【Stylish design and light weight】» Appearance suitable for men, women and children. Long hair can be hidden with comfortable extension buckle.