Experience stunningly straight, frizz-free hair. Long-lasting moisture, and thermal protection. Strengthening hair from the inside out for smoother, more manageable styling. Saving you countless hours of daily hair maintenance for 4-7 months of hassle-free, beautiful hair. | Formaldehyde-free and paraben-free. Natural looking results are instant and typically last 4-7 months, far beyond what a keratin mask or serum can achieve. Enjoy months of hassle-free, beautiful hair from the moment you wake up. | MK Keratin has over 15 years of experience producing the highest quality keratin hair treatments available to consumers and professionals worldwide. Millions of satisfied customers. | Featuring simple, easy-to-follow instructions from our experienced team making your experience a breeze. | Alisado sin formol de keratina.