Color Switch Duo by Vera Mona is the only product on the market of its kind. It removes the color from eyeshadow brushes helping the makeup artist switch to another color quickly and efficiently. The Duo's unparalleled design includes a centered mini sponge for wet make up application. Nothing else like this exists. Stroke the eye shadow brush against the Duo sponge to completely remove the color being used and switch to the next. The Duo's uniquely designed centered sponge enhances the color of the eye shadow when applied wet. resulting in a more vibrant look that is true to the pallet. or color being used. Discard wet sponge after every use. Discontinue use of product if irritation on skin or eyes occurs.