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. Specifications Water Resistant Contains color pigments that glow in the dark Permanent when dry Acid free Odorless Lightfast Apply to prewashed fabrics Shake well before each use. Test on inconspicuous area first. Dry flat overnight. Heat set with iron according to fabrics ironing temperature recommendations. Wash/dry on delicate cycle. Use mild detergent Keep capped when not in use. Adult supervision is recommended when used by children Uses Good for marking, drawing and writing on cotton fabrics. 222GO, 222GB, 222GR, 222GY.