Get creative with Crayola®! These bright and colorful fabric markers are made for marking on cotton or polyester fabric. You can create custom t-shirts, hats, backpacks, bandannas and more! Show your unique side when you create one-of-a-kind clothing. These markers are fun for a variety of classroom projects and are ideal for birthday party activities and craft projects. Fine line. Safe and non-toxic. (10 pcs. per set) 5 1/2" Colors may vary. Conforms to ASTM D-4236. Designs are easily set with an iron for 4 minutes on the reverse side of the fabric or in a dryer for 30 minutes on the hottest setting. Adult supervision required.