People of all ages can enjoy this fun, easy way to transform natural fabrics with dramatic, unique designs. Works best on cotton, linen or silk. Apply pastel directly into fabrics, cover completed designs with a clean sheet of paper or cloth, and press over it with a hot iron to set the dyes. Once set, the design is permanent and washable (if you are not happy with your design, don't iron it, just wash it and try again) Sold in units of 1 set