Clean your brushes Instantly with Color Switch® Duo. No water or liquids needed. The Duo also has a center sponge for wet makeup application. Stroke your brush against the Color Switch® Duo sponge to completely remove eye shadow color. Saturate the white sponge with water or a fixing agent All Color Switch® sponge can be washed with soap and water to reuse. Vegan and Cruelty Free.