Sofft Sponges- Mixed Pack of Four Sponge Bars Sofft Art Sponges are made with semi-absorbent micropore sponge material. Each sponge has a unique shape and size, designed specifically for artists and crafters. Perfect for applying color, blending, building up layers, underpainting, wiping color out... the uses go on and on! Some of the most simple tools are also the most versatile. Perfect for use with Pan Pastels, pastel sticks, charcoal, graphite pencil, watercolor, and ink. Sponges can be gently rinsed out in warm water and used over and over. This pack contains four assorted sponge bars. Each one is approximately 2 inches long from tip to tip by 5/8 inch thick. They have great edges for making both thin lines and broad strokes.