Brazilian straightening is a keratin treatment that deeply repairs damaged hair by filling in gaps and sealing the cuticles to provide softness, shine and hydration. In order to prolong the treatment and keep hair healthy, it is necessary to use smoothing shampoos. The smoothing shampoo is formulated without sulfate, without sodium, is gentle and thanks to keratin, it protects the hair against external aggressions and heat. The smoothing shampoo is gentle, revitalizes hair while controlling frizz and flyaways to reveal smooth, silky hair that is easier to style.