Washfast and permanent after heat setting with dry iron for two to three minutes. Formulated with the most light fast archival pigments. Tee Juice also leaves fabric soft to the touch. Works on synthetic and natural fabrics including cotton linen rayon silk wool nylon and polyester as well as canvas wood leather paper clay and more. This package contains one 12mm broad point fabric marker pen. Non toxic. Conforms to ASTM D 4236. WARNING Choking Hazard small parts. Not for children under 3 years. Recommended for ages 6 and up. Made in USA.