Bought these at full retail, seemed like a great pair of shades for the first month or two. After getting a combination of sweat and salt spray on the lenses- what I consider nornmal use they quickly turned into a blurry mess. After 6 months I can't see clearly out of the lenses at all. I was told these were for sport/outdoor use, similar to oakleys- these would be more for driving etc. I contacted Kaenon since they are under warranty, was told "sorry for your experience, the lenses are triple coated and cant come in contact with sweat/salt water" and said they would sell me some new lenses for $100. Not the level of service or quality product I would expect for that price.