The wool addition in these Carhartt socks can absorb up to 30% of its weight in water without feeling wet or losing its insulating properties. 87% wool, 7% nylon, 3% polyester, 2% acrylic, 1% lycra spandex. Anti-odor properties fight odor-causing bacteria. Durable reinforced toe and heel. Wool offers temperature regulation. Fabric blend wicks moisture for dry comfort.