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.