mens thermal socks
Made for us by Brian of Choice Alpaca Footwear in the United States. They are extremely thick terry looped construction (much more than ours) and longer. They are made of 45% alpaca 45% acrylic and 10% nylon.
They should be machine washed on a wool programme and it states on his bands that they can be tumble dried on a very low heat - not sure we would be that brave!