I have purchased this item numerous times over the last 5-10 years.  I find it protective of my glasses and easy to use.  If have several pair of prescription glasses, tinted and not tinted, sunglasses, etc.  I also have about 5-6 pair of reading glasses that I keep in these holders in my bedroom, at my computer, in the kitchen, in my sewing room, in my basement, and at work.  All are in these holders.