I bought these socks just before my marathon. Until then, I always had for very long training runs large blisters under his feet. These socks were then with me in the marathon debut and were just amazing. I had after the marathon not a bubble on the feet (my feet looked really fresh out). Moreover, I had no pain in the feet and ankles by the compression and support function. Other socks often irritating seams or imprints, in this sock me so far noticed nothing disturbing. The only very minor drawback: After a month of frequent use, the socks do not feel quite as tight as at the beginning, but that the tissue after frequent use is a little looser can probably avoid at any sock. (Eng they are still) Me have the socks convinced definitely, but I think there has to make each his own experiences, because feet are different for every sensitive. For me it was simply the right socks for marathon.