Easily remove color of your brush. Simply glide eye shadow brush against the surface of black sponge to remove color and switch to next color. Efficient and Reusable. Both Sides of the black sponge are usable. The Sponge could be washed with a fragrance free soap and warm water. This sponge tool allows you to use the same brush with different eyeshadow colors in one use. Perfect for removing powder color/shadow color, not for liquid. Suitable for travel: small size and light weight, easy to carry; Black sponge can clean your makeup bag quickly, meet your daily needs.