The MadamSew Chalk Marker is a temporary marker with a toothed metal wheel that produces fine lines of chalk on fabrics. These fabric markers are always sharp and draw both straight and curvy lines. No need to sharpen the tip. The chalk doesn’t fade or brush off unwantedly, but is easy to remove. The chalk marker’s wheel rolls smoothly over cotton, knit fabrics, jersey, synthetic fibers, suede, leather... (Don’t use them on silk and nylon fabrics!)