Darn Tough socks are made in Vermont USA, where they can keep a close eye on the manufacturing process. They manufacture very rugged walking and mountaineering socks both for men and women. They believe that “Nobody ever outsourced anything for quality” and give an unconditional lifetime guarantee: If Darn Tough socks are not the most comfortable, durable and best fitting socks you have ever owned, return them under the Darn Tough warranty for replacement. No strings. No conditions. Open air is one of few UK stockists from which you can buy Darn tough socks.