William COttrell
As a long time Costa wearer I was shocked how cheaply the frames on these glasses were made. This is my 6th pair of Costas all with the 580 glass. The 580 lenses were great, as always but Costa should be ashamed of putting their name on the glasses with such horribly designed frames. The hinge is simply a C shaped piece of plastic that snaps around a post. Bought them and they broke in less than 2 weeks, one of the C shaped hinge pieces broke off. What were they thinking? They were returned (thank you Amazon). A $10 pair of sunglasses from a drug store are built better. After this experience I have now switched and trying Oakleys, your loss Costa.