It's pretty, it's strong enough. It just comes with these little hooks on the end and I wasn't sure what exactly I was supposed to be hooking them to. Certainly no part of my glasses. Thankfully I had little silicone loops that were with my old one, I took those off and wrapped them around the arm of my glasses like a rubber band and then put the little hook of these through the band. It works, but I feel like they should have been more specific as to what I should have in place to put those little hooks on. Had I not had those silicone loops already I wouldn't have been able to use it.