What are its best qualities?
It can be as fine and soft as a cobweb, or as robust as you wish to make it. It is waterproof, windproof and will not catch fire. As a natural material 100% wool felt, allows air to circulate, and therefore is pleasant to wear. It is an excellent insulator, and is a very efficient sound-proofing material. It can also easily be molded into new forms, and when it is dry retains its shape.