I purchased them because I have concrete floors. Everything is so well defined and the stereo separation is perfect. I was able to find set of weights finally as people are charging crazy money for a couple of 25 lb plates! The height of the boots hit right where my calves start. Well, they sure wont slip on to either of my feet! I will update my review after those arrive. FINALLY samsung got it rightl! Repeated tests against $75 ear buds showed that I sounded more distant despite the boom mic being closet to my mouth. I have bought Dearforms for many years and these are cheap knock off?s. I highly recommend these Fila slides.