These fabric markers are really juicy! They have a sponge tip and they are filled with liquid fabric paint. Make big, broad strokes of color on any cotton based fabric. Ideal for t-shirts, jeans, canvas, jean jackets- any natural fiber clothing. Colors are fixed by ironing for 2-3 minutes for washability. Non toxic; ideal for artists of nearly any age! These are SO juicy that when you first open them, you will want to open them over a sink and not over your lap!