I've worn Rainbow Sandals for years and have always bought them directly from the company web site. This time, I purchased them on Amazon so as to take advantage of Amazon Prime and have them here before our family vacation. They arrived right on time, but there is something very odd about them: Instead of the entire bottom being covered with the non-slip rubber, only strips of it are covered, and the rest is strips of soft felt (see photo). This felt won't last a minute on the hot LA pavement! I am guessing these are (a) defective or (b) fake Rainbows -- unless this felt-looking bottom is a new thing that I'm just not aware of? Some strange new species of hemp? Now begins the process of returning them; no sandals for vacation after all. What a bummer (but first-world problems, I know). I've learned my lesson and will buy direct from the company web site in the future.