Favorite socks. I love good gear, and am usually one that is willing to pay for a good product. I've thought for a while now that Smartwools were a little over priced for how long they lasted. They've always been great socks, but the have worn out rather quickly. These new PhDs are comfy and have lasted. I'm a fan. The toe and heel fit is great. i've learned that by not buying a pair that is super tight will also add to durability. I am in between a M and L and have recently worn the L and they are a little bulkier, but hold up better.