Darn Tough makes socks and only socks. This company is a family run business and started Cabot Hosiery Mills in 1978 in the Green Mountains of Northfield, Vermont. 10 years ago, they introduced Darn Tough Vermont to keep producing in the USA. Vermont is the perfect location for testing out the finest Premium All Weather Performance Socks. They ski, snowboard, hike, bike and run in the most unforgiving climate in the lower 48. It is under these conditions that they design, test and manufacture their socks. The most important priority for Darn Tough is to make the best possible socks the world has to offer. They are so confident in their products that they back up their socks with an unconditional lifetime guarantee.