The Medoral Duo Plus, available in both natural and nylon bristle varieties, provides the ultimate in teeth-cleaning action. Along with the superior handle shape of the Medoral Series brush and the diagonal bristle field with the larger bristle pattern, the Medoral Duo Plus goes one step further; these toothbrushes feature two types of bristles- a softer, longer outer bristle field that provides effective cleansing action while massaging the gums and attacking the build-up that tends to accumulate at the gum line, as well as a medium, shorter inner bristle field designed to remove the tougher build-up that accumulates on the tooth surfaces.