The Smartwool Wintersport Yo Yetti Kids Ski Socks are made with cushioning in the calf, shin and foot for optimal warmth on the slopes. Its flat knit toe seam are added for additional comfort. Sock Height: Over the Calf, Light Cushion on Shin, Calf, and Foot, Flat Knit Toe Seam, 68% Merino Wool, 31% Nylon, 1% Elastane, Warranty: Lifetime, Material: Wool/Synthetic Blend, Type: Ski, Weight: Mid, Model Year: 2021, Product ID: 575283, Model Number: SW001030003-S, GTIN: 0192363625782