These are my 3rd pair of these glasses. I have had pairs of different glasses in the past and they break within years. I have Oakley, ray bans, etc. These just fit my head comfortably and last for at least 7-8 years and then they will just lose a screw or I get a scratch on the lens. These are some of the best glasses In my opinion, out there. They are comfortable, not too expensive and they fit people with larger heads with no issues. So, you don't feel too bad if you lose them.