Men's Merino/Silk Hiker Heavyweight Crew Socks 61% Merino Wool, 28% Nylon, 10% Silk, 1% Spandex Made in the USA or Imported Machine Wash 65% Merino wool, 20% nylon, 10% silk, 5% spandex Seamless toe closure Cushiony all over, foot-hugging fit, stay-put top and leg Machine wash warm do not bleach tumble dry low Made in USA