felting

Noun

 * 1) The production of felt from wool.
 * 2) The tangling of woolen fibres (such as when an article of clothing is washed at too high a temperature)
 * 3) The hobby of making objects, such as soft toys, from felt.
 * 4) Felt or similar material, usually impregnated with a water-resistant material, or the application of such material, usually to a roof.