This is the ultralight performance sock with extra protection for runs and races. The Ultralight Mid Sock is a performance running sock with ankle coverage to keep the dirt and dust at bay. Lightweight and protective, thick heel and toe padding combines with anti-blister patches. Because on race day, little details can make a big difference. Get off on the right foot. As you pile on the miles, cool and dry feet are what it's all about. So the only thing that's heating up are your lap times. A sock that hugs your feet, a sock that feels like a second skin. With a snug and supportive toe box and an ultrafine gauge yarn, this sock is all about that feeling of running sockless yet supported. This sock is all about performance.