LenzLock super-secure magnetic holders for sunglasses and eyeglasses help prevent losing, dropping or stepping on your expensive lenses. We've all done it! Now you can conveniently store your glasses safely and securely until you need them. LenzLocks are easy to install: just position, place, and pair the magnets together on caps, visors, beanies or other hats. When you aren't wearing a hat, you can also use a single holder on shirts, sweaters, jackets and more. The holders fit any style of eyeglasses or sunglasses and are ideal for keeping your reading glasses with you anywhere you go. They have unlimited uses for work, sports, relaxing, reading, at the beach or wherever you take your glasses.