the cut edge is rubbed with something over the edge. I usually cover in a small piece of plastic so when I rub I don't rough up the surface with my fingers. the smooth surface of the wool is the wool they used and possible they have shaved them before adding the picture. I know the C1 cross wool they have at new England Felting supply makes a smooth sturdy felt. everything stays smoother if they are not thrown. Throwing causes a lot of fuzz.