The Blaze is the thickest DeFeet wool sock. With a full terry underfoot padding and over foot padding for extra protection, this sock will handle it all.Fits U.S. Men"s Sizes 12+Fits U.S. Women"s Sizes 13+Machine wash cold, tumble-dry low, no chlorine bleach63% Wool, 27% Nylon, 10% Lycra SpandexAir-E-Ator Vapor Zone - The DeFeet invention that started the "airflow" sock rageEn-Duro-Skin puncture resistant heel and toeSole2 double-sided sole construction makes the combination of durability and moisture management a realityMid-foot compression banding for stabilizationMach Rib cuffLace PadItem SpecificationsColorCharcoal/GrayMaterial63% Wool, 27% Nylon, 10% Lycra SpandexSizeX-LargeSeasonCool WeatherCuff LengthAnkle, 3-4"Type of MaterialSynthetic,WoolDefined ColorBlack