Unfortunately I had after the first wash (of course according to the manufacturer) to determine that the socks by about 5 (five!) Numbers have become too big. I bought it in size 35/38 for my girlfriend, after washing it fit me perfectly with shoe size 43. We ignore the fact that the socks were originally meant only for cold feet on the couch.
Now, after not even half a year carry (in fact after three months, because the two pairs were used in alternation) is nothing left of the high-quality impression. The anti-slip coating dissolves and the heels have gone through.
Therefore, a very clear non-buy recommendation. For the money I could have bought some no-name socks more and probably for a long time fun with it.