This pair of glasses broke before the first day. Right out of the package you could see the screw that holds the hinge was loose. Screwed it back in but it was still loose. I had considered using glue but then the arm would not be able to bend back. I went out with them on. After a few hours bar-b-quing I went to take them off and the arm came off the frame. Pure crap. Don't get these, you will be soooooo disappointed.