These high tech crew socks feature everything from thermoregulation to advanced cushioning to keep you supported no matter what adventure awaits. This product was consciously made to reduce our footprint and supports our mission to be a little bit better every day. Smartwool partners with with ZQ Merino to ensure the sheep that produce their wool are treated humanely, the wool growers are treated fairly, and the farms work to minimize their impact on the environment. Machine Wash Warm Made in the USA