The problem is not the quality of this product, but the convenience. I didn't like how this system attaches to your glasses, if you attach it to the back of the glasses you have to deal with it rubbing against your ears, if you attach it to the front of the glasses it not only shortens the weak length, but needs constant adjustment when putting on glasses. You're better off buying a leash that will grab the ends of your frame so you never have to fiddle with anything!
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