GOOD BRUSH HYGIENE has never been easier when you use the True Decor Makeup Brush Cleaner Sponge. An essential part of your makeup tools, it removes cosmetic residue from bristles so you can switch colors with ease. CHEMICAL-FREE and dry, the dual-sided sponge works by simply drawing your makeup brushes over the surface a few times to remove leftover pigment. There is no need to use water or wait for bristles to dry between colors.