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 increasing the thickness of the heel, which can change the fit of your shoes. The sock has strong compression, so if a looser fit is desired, one size larger should be chosen. Type Article Colour name white Gender Unisex Size (EU) 38.0, 38.5, 39.0, 39.5, 40.0, 40.5, 41.0, 41.5, 42.0 Main colour white Season Winter Type mid-high