Made in USA or Imported Low Profile, High Marks The lightweight yarns used in the Athletic sock line are battle tested, and the Merino Wool construction Darn Tough uses makes them one of the most versatile categories they knit. The lightweight no show tab Element carries the signature mesh on top of the foot for breathability and the lowest profile of a near indestructible foot. Because you shouldn’t step in lava. Merino Wool: The ultimate fiber for breathability and comfort in all conditions. Still made in Vermont, USA. Still unconditionally guaranteed for life.