Five years ago, we were given 2 pairs of these Fitsok running socks from a dear friend who owns a running shoe store in Santa Rosa. He said you would never want to wear another brand of running socks again, and he is Absolutely right. We have tried other �similarly priced �socks and none fits as well and last as long as these. Going on a long overseas trip, we feel we need more so our feet are happy for the whole time. I also wear the iso wool hiking socks and they are absolutely great also. Also bought iso wool and F4 tech socks for an avid runner and overseas friend, I had given him a pair of the iso wool socks last year and he wants more Fitsok for him and his family.�