Felting is the oldest form of weaving. It makes full use of the characteristics of wool fiber,such as heating,lubrication,compression and does not need to be processed by weaving or knitting,which completely interacted and formed a so-called felting phenomenon to making your DIY.
There is an interesting story about the origin of wool felting. A named St.Clement shoes business man trying to avoid enemies but he got serious foot pain,then he put the collected wool in the shoes.It was unexpected that he forgot the pain when he ran away with the wool.Finally he shake off his enemies and then take out of his hurt foot,which make he surprised was that the wool became into an integrated felting wool.
This is an interesting story and then we know the origin of wool felting.