Unbleached or Natural Muslin makes for a very soft pleasant warm bounce and can also be used as a very heavy diffusion. Muslin fabric is made of loosely woven cotton that holds dye and bleaching extremely well. Muslins can also be painted to make backdrops and are often used by still photographers with an abstract painted on them. Unbleached Muslin in particular is a very in-expensive bounce material that can be glued onto foamcore or beadboard for 4x4 or 4x8 bounces. The best adhesive for this is 3M Super 77 or 90. Unbleached Muslin comes in very wide rolls which make it perfect for large overhead rags and a make shift rag that gets clipped on a speedrail frame with speed clips.