Have you experienced this breakdown of the materials before? I believe they have changed the "leather" that they use. I recommend this product for those who wants to shape their tummy, legs, and lift their butt. Ive had similar shoes that the sole colapsed quickly. They dont seem to be slippery when the soles get wet. The plastic is thin, cheap, and flimsy. I preferred mono chat with my surround system. Searching on Amazon, I found a dizzying array of suitable products. Ok, so this is going to be a bit long winded but Im speaking to my specific expectations vs my experience. 5 tennis shoe but I wear an 8 in these. I like these a lot and plan on buying more pairs.