Make your own unique designs on bags, clothes, and more with Pebeo 7A Opaque Fabric Markers. These water-based markers have a 4mm round tip and air dry in two hours to a lovely matte finish. These markers work on most light and dark pre-washed fabrics, including: cotton, linen, cotton-linen, knits, jerseys, velvet, jacquard, polyester, blended fibers, nonwovens, and even leather. Heat setting with an iron is required. Colors will hold when washed 48 hours after application.