This 3-pack of socks is designed for everyday and all-weather use. The Rocky Merino Crew sock is made from a blend of 60% Acrylic, 23% Merino wool, 15% nylon, and 2% spandex. Even with a heavyweight construction these socks are suitable for different temperatures thanks to the naturally temperature regulating properties of Merino wool. The wool and acrylic blend also keep your feet dry when needed.