Contents:65% Merino Wool, 33% Nylon, 2% Lycra® Spandex * Using the latest generation of Italian knitting machines, we"re able to knit ultra-light yet extremely dense socks with an undetectable toe seem, here in Vermont. The result is miles and miles (and miles) of blister-free bliss. Feel the difference of feeling nothing at all. * Sock Care:To help ensure many happy miles with your Darn Tough Vermont socks we recommend that you machine wash them in warm water on gentle cycle with socks in-side out. Do not bleach. Tumble dry on low. Do not dry clean.