DecoFabric markers are great for dark colored fabrics. It is water resistant when dry. Heat setting is recommended. Heat set with an iron according to fabrics suggested guidelines. The fine point tip is great for details. DecoFabric is acid free, non toxic, odorless and lightfast. Easy and fun to use. Kids will love using them too. Good for marking, drawing and writing on cotton fabrics. Paint and decorate; T-shirts, aprons, sneakers, tote bags, etc.