I've had these glasses for about 10 months now, and I'd say I've put them through a pretty solid test of how a pair of all-purpose sunglasses should perform. First of all, one thing I really like about these glasses is the construction. They are incredibly sturdy and light, and they are made from top shelf materials. They have rubber grips on the sides, which help to keep them on your head, especially if you wear hats a lot like me. The frames have three small vents on each side just underneath the lenses, which improve airflow and help with defogging the lenses. These lenses have never fogged up on me, and that is something I really look for in a pair of glasses. The lenses in mine are green mirror and polarized, which in my opinion is essential for uses like fishing or boating. I took these with me to Canada this summer on a fishing trip, and they are really worth the money. They are made with nothing but quality and I would never go any other way with polarized sunglasses. The lenses are incredibly clear and bright, and emphasize natural colors in the environment and in the water. I have found that all other glasses I have tried when fishing are inferior, and Costa del Mar's can hold up to anything thrown at them. I've dropped these in salt water and never worried about rust or corrosion, because I know I got all of what I paid for. I highly recommend these sunglasses for anyone looking for a superior pair of sunglasses for all-around use.