Regenerate the hair fiber. Remove frizz from hair. Moisturize and straighten naturally for a prolonged period of time (more than 4 months). It is progressive because, after time, the hair will return to its original state in a natural way. It can be washed day.You do not need cuticle-opening shampoo.Thanks to its 100% natural ingredients we achieve natural and long-lasting smoothing. The Brazil Protein product line is born from the passion for developing safe and effective cosmetic products. Therefore we do not use formaldehydes or formaldehyde in our formula.