I swear I cannot go outside without these.  Usually glasses like this look like those caterac glasses you see the elderly wear.  These look like real sunglasses, and is GREAT FOR PEOPLE WHO WEAR GLASSES REGULARLY like me.  And night time glare is reduced for better vision on the roads.  The only thing I don't use is the clip so I can't tell you how that works or how long it works before breaking.  But the glasses are study.  My first pair I had to replace after around a year, which is normal (or for me really long for a pair to survive).  One of the screws had come loose.  I have been using this product ever since.