70% Merino wool, 25% Polyamide, 5% Elastane The Silca Winter Sock is made with the same modern Italian knitting machines as the Everyday Aero Socks. By using merino wool, the toe box has extra padding (perfect for absorbing water and sweat) without changing the thickness of the heel, which can alter the fit of your shoes. The sock has strong compression, so if a looser fit is desired, one size up should be chosen. Item Article Color name white Gender Unisex Size (D) 46.0, 46.5, 47.0, 47.5, 48.0 International size XL Main color white Season Winter Type mid-high