Needle felting it's felting without water.I use special barbed felting needle to sculpture wool I push the top layer of wool into deeper layers, fiber "stick " to itself without soap and water.
To make one sculpture I have to poke the razor sharp barbed needle in to raw unspin wool thousands of times until the fibers matt together to form a 3D solid felt.
To make clothe for my sculptures I use old wet felting technique