PRO ADDICTION Intro Kit Purple 4 Piece. Multi-Protein Straightening System PURPLE 150ml. Penetrates the hair, promoting a re-balance of the molecular structure. This, not only provides greater control over the degree of straightening, smoothing or defrizzing the hair that can be achieved, it also restores hair to health and provides excellent, long-lasting results – leaving the hair looking shiny and feeling revitalized. Multi-purpose – straightens hair, relaxes curls, defines curls, or defrizzes – according to your preference.