A must for every watercolorist's tool box! The natural and synthetic sponges in this assortment include two expertly harvested and processed Caribbean sponges that are ideal for fine to medium details in decorative painting and faux finishing. The two sea wool sponges will help create interesting shapes by adding or removing paint and water from the surface of paintings, and the two round synthetic sponges are perfect for special techniques, general clean up duty, blotting brushes and soaking water and paint from mixing areas.