85% merino 10% polyamide 5% elastane. Made in the Czech Republic.Premium merino yarn LORD90 with the highest merino wool content in the fiber and with G certification.O.T.S. which guarantees the use of gentle and health friendly practices for all those involved in breeding and production.Excellent insulating properties and high warmth. Thanks to the special fiber structure and knitting technology even a thin layer of wool can heat up. Natural antibacterial properties merino is selfcleaning and does not smell even after prolonged wear. 1618% absorbency moisture is drained inside the fiber so the sock warms up even if it is not dry.Wash at 30 degrees in wool detergent (without fabric softener) squeeze at low speed air dry dryers significantly shorten the life of merino products. Merino tends to lump. Don't be sad about it it has no effect on the function. Be prepared that you will never want other socks again.