INVERTO ONE KERATIN TREATMENT IS FORMALDEHYDE-FREE. PARABEN-FREE. INVERTO ONE is made with Advanced Penetrating Amino Acids. Amino acid help's deliver proteins oils and other essential elements that brings back the beauty and shine of your hair. Strengthens, conditions, and straightens the hair using a proprietary formulation, removes frizz, curls, and adds superb shine, silkiness and softness to your hair. Minimal fumes and a very easy application process! AT-HOME KERATIN HAIR TREATMENT FOR ALL HAIR COLORS AND ALL HAIR TYPES- Instant Results without anything else to do!and it will last for months. STRAIGHTEN YOUR HAIR, ELIMINATE FREEZE FOR MONTHS, SUPERB SHINE & SOFTNESS INSTANTLY ANYONE CAN DO THIS- We specifically made INVERTO ONE so that ANYONE can do it from the comfort of their home. SERIOUSLY. We recommend thoroughly reading the instructions provided it is simplified to 4 easy steps