Everything about this sock was created to work seamlessly with a high-performance boot: strategically placed cushioning on the heel and toe, light shin cushion, non-cushioned heel and toe, and all the benefits of Merino to help keep you warm and dry. The 4 Degree elite fit system creates a dialed fit and Indestructawool durability technology delivers long-lasting wear. A women's-specific fit creates a narrower heel and overall slimmer fit 13in. Overall Height, Virtually Seamless Toe, 200 Needle Construction Provides High-Density, Low-Profile Cushioning, 4 Degree Elite Fit System, Mesh Venting, PhD Performance, Made in USA, Warranty: Lifetime, Material: Wool/Synthetic Blend, Type: Ski, Weight: Light, Model Year: 2018, Product ID: 499610, Model Number: 01369-590-S, GTIN: 0190849886023