I have 3 weights of cheesecloth. #10 is the lightest and cheesiest. Great for halloween ghosts. holding batting in place or filtering out larger particles. # 50 is great for Nuno felting. Very sheer, much better as a filter. # 90 is like a very fine muslin. Can be used alone. Too heavy for Nuno felting unless you use very fine wool and cold water to start. Nice as an inner lining with wool quilt batts.