How do woollen clothes keep us warm?

Hello There! You see when you where woollen clothes, apparently you feel warm and that is because there are Hair like structures on the wool ( every wool ) if you have studied in science or biology, you know there are root hairs on the roots of plants, they help them to absorb water! Like that wool have hairs that absorb coldness and keep us warm? Hoped that this helped you!

The answer is constant.