The Mil-Spec Sport Sock shares specifications with U.S. Military socks: proven to kill bacteria and promote moisture migration. These socks are tough. American Trench made a slight change to the "Mil-Spec" design, adding a compression band in the footbed for additional performance, comfort, and arch support. This sock stood up to heavy-use hiking, trail running, biking, and outdoor activity. But the real test? Cement work. Nothing destroys clothing more than hauling, grinding, sanding, and mixing bits of rock and cement. American Trench's cement-working friends gave them two thumbs up, which was the ultimate endorsement.

• USA grown and spun cotton
• Content: 74% Cotton, 22% Nylon, 4% Spandex
• Fit: one size (US men's 8.5-13), stretches over the calf, stays firm on the leg
• Care: machine wash, tumble dry