These are some of the most comfortable shoes I've ever owned, but they don't last long. I think I used them for about 3 months before the bottom (outside) was completely ruined, the parts came loose with wear and tear. Used on concrete and smooth hard floors. They held up well to moisture and rain on the rest of the shoe, but the bottom part was literally falling apart. It might have lasted longer if only used indoors, but what's the point? Rschunimagu