The positive overall picture is for me the thickness of the substance, as I said the very dampening effect while walking. Here also wrote one reviewer about "slipper replacement", I can only confirm. Meanwhile, I have my first 2 pairs of 3-4 times washed. Of course, even the best materials are sometime gradually wear out. The comparison with high-quality and higher-priced socks keep them but with all means.
Therefore: buy in any case!