What is the warmest material to wear in the winter?
user
Generally speaking, the warmest thing you can wear is wool.  Wearing a heavy sweater or thick socks can also help.  And some people like to wear thermal underwear.
assistant
What is the warmest material to wear in the winter?
user
Is this something you want to wear all over your body, or is it something you want to put on specific parts of your body?
assistant
What is the warmest material to wear in the winter?