This blending sponge is made of odorless anti-microbial material. It can be used with liquid foundation, cream blushes, concealers, powders and primers. Use the smaller side for more precise application and the larger side for all over the face. Great for blending uneven areas on the face. Use wet to create an airbrush finish. Easy to clean-use a makeup brush cleaner or any antibacterial soap. Just wash it, rinse it and squeeze out any excess water. Let air dry and it's ready to use again.