Pentel Arts Pastel Dye Sticks and Gel Roller for Fabric will transform natural fabrics into brilliant, fun and unique designs. Brilliant, acid-free pigment in a easy-to-use crayon form. Apply bright, vivid colours directly on fabrics. Designs are permanent once heat set. Permanent, waterproof, acid-free gel ink for fabric. 1.0mm tip produces distinct, bold lines. Ideal for use on linen, canvas, denim, cotton, and most all-natural fabrics.