Smartwool Women's PhD Pro Freeski Socks The Women's PhD(R) Pro Freeski elevates boot fit, durability, and comfort. With features like a Women's specific fit, contoured shin and ankle cushioning, and a flat toe box, your feet will stay nice and comfy in your boots as you tear down the slopes. Features: Sock Height: Over-the-Calf Angel Collinson signature sock Contoured shin and ankle cushioning, with flat knit toe box Made in USA of Imported Yarns: 55% Merino Wool, 42% Nylon, 3% Elastane