A light-cure, nano-superfilled, radiopaque restorative composite resin, CLEARFIL MAJESTY Posterior is composed of nano- and micro-inorganic filler treated with a proprietary new surface coating technology. The new surface technology permits a larger quantity of nanofiller to be dispersed in the resin matrix, which consists of monomer and microfiller. The resulting resin matrix is reinforced with a filler loading of 92wt% (82vol%).