Get the sock that gives back for a little karmatic 'trail magic' on your next hike. 5% of the sales of the Darn Tough Merino Wool ATC Micro Crew Cushion Hiking Sock goes to the Appalachian Trail Conservancy for outdoor educational programs and trail maintenance. You'll be glad you did. The comfortable merino wool and spandex construction of the ATC Sock wicks moisture and absorbs shock to keep you comfortable and fight fatigue, and the nylon keeps the ATC super durable. Merino's odor fighting properties make you a little more bearable to be around, especially after a long, grueling hike.