Fox River designed the Sugarloaf sock with perfect boot fit in mind by keeping the construction thin while not compromising warmth, through the natural thermoregulation qualities of merino wool. Fox River's URfit system makes the Sugarloaf feel like it was custom made for your feet. In addition to being anatimocally designed for women, this sock employs a proprietary memory-knit construction that keeps the sock in place all day and ensures the sock does not lose its shape over time. Strategically placed compression zones add additional support while also improving circulation in your feet. Whether you're a competitive skier in need of a precise boot fit or just looking for a flexible ski sock that works well on both warm and cold days, you're sure to love the Sugarloaf.