A perfect sock is a thing divine. And with the Lowboy Sock, Castelli just may have created the perfect sock. True to its name, it is an anklet that will just barely peek out above your shoe line. What makes the Castelli Lowboy Sock so great is the way that they have constructed it to hug every curve of your heel and cuddle every portion of your toes. No worries about there being an excess of fabric at the closure points on either side of your toes. That’s the worst when your toes are getting bunched up in your shoes because the blasted sock just came with too much fabric. It is also fitted through the mid-foot, providing support and keeping the sock in place even in the middle of the heaviest activity.