53% US Merino wool, 44% US Nylon, 3% US Lycra Spandex Made in the USA or Imported The Hamilton is a new take on the classic fair isle design. Bright colors embolden Nordic snowflakes interlaced with multiple repeating designs. Just as your fair isle sweater is your favorite cover-up in cooler weather, this lightweight 100% American merino wool sock is certain to be high in your sock rotation. The Hamilton features all the hallmarks of our socks - seamless toe closure, reinforced heel and toe, comfort compression fit. U.S. Merino Wool: We source our 100% U.S. grown merino wool exclusively from sheep raised by American farmers on American farms. Merino wool keeps you cool in the summer and warm in winter. Crew: Traditional sock height that fits firmly on the lower calf, also known as the daily. Seamless Toe Closure: Advanced knitting techniques create a totally flat connection in the toe box, reducing bulk and eliminating blister-generating friction. Durability Assured: Reinforced construction and low-stress seam placement reduce wear and tear, increasing the life of the sock.