General principles can be given for the preparation of aqueous solutions, dispersions, or emulsions for addition to aqueous latices. The particle size of dispersion and colloid stability should be comparable to that of the latex to which they are added. Also, the pH and ionic strength of the aqueous phase of the dispersion should be similar to that of the latex aqueous phase. Few attempts have been made to incorporate fibers into natural rubber latex foam (Blackley 1966). The use of glass fiber to reinforce natural latex foam rubber has been studied in some detail, and such an approach is claimed to reduce shrinkage and increase tensile strength (Madge 1962). Mineral fillers such as kaolinite clays and calcium carbonate have also been added as fillers for latex foam (Blackley 1966). Improvements in properties of high styrene-butadiene lattices have also been claimed by addition of mineral fillers. In general, however, the addition of any normal type of compounding ingredient gives little advantage with respect to the load-weight ratio (Murphy 1951; Blackley 1966). Despite that, to the best of our knowledge, there have been no research studies that have incorporated RHP as filler in natural rubber latex foam. So far, there have been no reports of adding natural fibers to natural rubber latex foam.