Wrightsock Women's Merino Trl Qtr 3 Pack Athletic Socks Outer: 72% Merino Wool/24% Nylon/4% Lycra; Inner: 70% Polyester/30% Nylon Machine Wash A functional wool product designed in a lighter weight The benefits of wool but it's not against your skin Stabilizer zone to help lock the sock in place Mesh panel for breathability Perfect for trails, travel and the office