Why use the keratin smooth system*?For the first time for TRESemmé, keratin smooth 5 benefits in 1 system* infuses marula oil and keratin protein. This system* will unlock professional-quality smoothness for hair with natural movement.Our extraordinary smoothing system* gives you not one, but five smoothing benefitsUp to 72 hours of frizz control*Perfectly detanglesSilky ShineSoft feelTames fly-awaysProfessional-quality smoothness for the hair you've always wanted.*Consumer test, TRESemmé keratin smooth shampoo & conditioner