I live in Florida and am able to wear these nearly year round, so I have 8 pairs in many colors. Years ago I bought my first pair in a size smaller after reading other reviews but had to return them for my usual size 7 (sizes run true).  My legs and rear have NOT changed one bit as a result of wearing these shoes, but I can reliably wear them immediately "out of the box".  When they get soiled I use a dedicated toothbrush and hand soap to clean them up.  I still have my original pair that look good enough to wear in public. At first I thought these shoes were just too expensive but since have learned their quality equals their cost.