Darn Tough Vermont is a family-owned, American manufacturer of end-use-specific socks. We design, manufacture, sell and promote the most comfortable, durable and best fitting socks available in the market today. This promise is backed up by our unconditional lifetime guarantee. If you can wear out our socks we will replace them free of charge. We are one mill. Every step of the knitting process happens right here, by us, locally if you will, in Northfield, Vermont. All-under-one-roof affords us the ultimate in quality and control. It yields a sock that is unparalleled in comfort, durability and fit. “Nobody ever outsourced anything for quality,” is why we’re still making our socks here in Northfield, Vermont. U.S.A.