Don’t let frigid weather stop you from enjoying your day out skiing. The PhD® Ski Medium delivers maximum warmth and breathability when the going gets cold. Indestructawool™ technology makes these some of our most durable socks yet to make sure your feet are ready to go run after run. Our 4Degree® elite fit system helps create a sock that doesn’t bunch, slip, or bind and our women’s-specific fit features a narrower heel and overall slimmer fit to help this skiing sock handle it all.