I was a sad backpacker when the wigwam stopped making Ironman socks. Unlike almost every other I've tried, they stayed up and didn't slide down or bunch up around my arches. These are even better! They fit better than any socks I've ever worn. There's a left and right side (and they're labeled) so they can provide fit and arch support. They come in XL which is a big plus for my size 13 dogs. I could stop wearing long socks altogether. Won't buy again, WILL buy again.