Darn Tough Vermont is a family-owned, American manufacturer of end-use-specific socks. For close to 40 years they have been knitting socks here in the Green Mountains of Vermont. Darn Tough are three generations strong and know how to make socks. Crafting the world’s most comfortable, durable, and best fitting socks is an ardent skill passed down from father to son. This commitment, this passion, it’s in the blood.