The heel is maybe a pinch thicker than Walmart flip-flops (I have several from that store for comparison) but the sole was quite firm and inflexible. La numeración viene exacta, la impresión excelente y la sandalia es cómoda y antiderrapante. In the picture, you?ll see a pair of small size 5 boots, it?s not a great fit. One last note, these headphones, as with many others may block sound outside, but definitely amplify some interior sounds of joint movement and impact reverb when running. There was one game that was an exception to that. I enlarged the hole in the top with a drill to allow the sonos plug to go through, only took a couple of minutes with a drill. I love that they have a nice thick rubber tread so when I step outside in them the top section doesnt get wet. And on the flight, ugh! But to make sure it works to its full potential, be sure to use Equalizer APO and Peace, both can be found from SourceForge. This crackling was also heard through the mic by the person I was calling.