Neither generate heat. Neither is warmer
Most likely wool or polyester.
Wool is thick and insulates the heat so it won't escape.
Wool is a natural fibre grown by animals as fleece; polyester is fabricated from petroleum.
Wool is generally warmer than cotton, due to the air spaces in wool.
Skirts are made in many different materials. They can be made from cotton, wool, denim, polyester, etc.
yea
No... not really... try wool, wool is really good!
warm wool
Better is a judgement and you are the judge. Lambswool comes from fleece grown by lambs. Wool may come from any age animal.
Polyester does not have an opposite. Lots of materials are different than polyester, but not in a way that makes them into actual opposites.
wool, cotton, linen, polyester, acrylic, flax
coats can be made of cotton, wool, and polyester