Duttch Professsional’s Keratin is an Ultra Strength Hair Keratin Treatment which can be done on coarse, unruly, extremely curly or very resistant hair leaving it soft, shiny and frizz-free. It gives you maximum amount of curl reduction possible on all hair types without breaking bonds. Delivers long-lasting nourishment and protection for up to 12-20 weeks. It controls frizz & protects your hair from humidity as it is rich in keratin protein.