Using insights of pro skier, gold medalist, and Smartwool athlete Mikaela Shiffrin, Smartwool constructed her signature sock, the PhD Pro Ski Race. They built these socks with their Indestructawool technology for enhanced durability, their 4 Degree elite fit system for a dialed, performance-oriented fit, and their Shred Shield technology for reduced wear from toes. Its design includes contoured shin cushioning, as well as a wider welt for a secure fit and comfort, increasing the amount of time you can spend out on the slopes, and taking your performance levels to a new height. The newly engineered arch elastic helps enhance ski feel and in-boot fit. When you wear what the pros do, it helps you perform like them too. Try it out today. 4 Degree Elite Fit System - For a dialed, performance-oriented fit with flex zone at ankle joint., Indestructawool - Indestructawool technology features a patent-pending construction method for exceptional durability and comfort., Shred Shield - Shred Shield helps reduce wear from toes., Ultra Light Cushion Snow - The absolute minimum between you and your boot. Ideal for new, vacuum-tight boots., Warranty: One Year, Material: Wool/Synthetic Blend, Type: Ski, Weight: Ultra Light, Model Year: 2022, Product ID: 915345, Model Number: SW001287052-M, GTIN: 0195441215165