I bought these about four years ago and haven't worn them for almost three years. I haven't worn them much, so they're not very dirty, but the color is quite different between the front and back. I'm not sure if this is how they were originally, or if they've faded from the sun. Also, please understand that these have been stored at home for a long time before purchasing! Please comment before purchasing. Feel free to ask any questions you may have! ^_^