Keratin Hair System Straightening System is a professional 3 step regime to straighten and smooth the hair. Suitable for all hair types, Straightening System eliminates up to 80% frizz and straightens the hair for up to 4 months without the need for specialist tools. Designed and engineered by top industry hair stylists and professionals, Straightening System provides salon quality straightening results in the comfort of your home.Featuring a shampoo, treatment and mask which work harmoniously to combat frizz and straighten the hair, Straightening System leaves even the frizziest and unmanageable of hair types looking smooth, sleek and shiny.