Alfaparf Milano Lisse Design Keratin Therapy is a progressive smoothing keratin treatment. Ideal for those looking for a high-performing treatment that is completely safe and formaldehyde-free. Intended for a gentle yet highly effective smoothing service with results lasting up to 3 months. Lisse Design Keratin Therapy contains heat-activated Kera-Collagen Complex, a complex based on Hydrolyzed Keratin and Quarternized Collagen with straightening complex; and Babussu Oil, a natural oil with extraordinary moisturizing properties that helps to make the hair soft, silky, and luminous.