The wool prevents 'the thing' from losing heat, i.e. it won't make a cold stone warm.
Things stay warm by preventing the thing it's keeping warm from losing heat. Some things that keep things warm are wool, tin foil, wood, glass, plastic, and rubber. Things that keep other things warm or cool are called insulators.
If wool is considered cloth, wool!
To keep ya warm
To keep something warm, wool would be the best insulator
Yes.
they keep the sheep warm and they cut it and turn it into coat jersy but different colour
Wool can absolutely get wet. Of course, once it does it will be ruined but that wasn't your question.
Greece
Things which keep warm things warm and cold things cold are referred to as insulators.
In all probability, when these fibres were made into clothing designed to keep bodies warm: yes.
No. Wool clothing keeps you warm because it has air trapped between its fibers, which acts as insulation to keep your body heat from escaping.
Mother Nature invented wool as a fleece to keep some animals warm: the fleece grows from their skin.