Shades of green

The first time I noticed it I though I was just tired and my eyes got the better of me. But then it dawned on me, not only the color of my ranger boots changed, but also their shape; they seemed to be smaller than before and yet they still fit my feet. Later they changed to different shades of green a few times more. They don't seem to be made very well fading like that. The climbing boots I keep didn't change in color or shape as a result of wear and tear so I guess they were made by a better tailor.