KHS Keratin Smoothing Straightening Styling Home System Kit is suitable for all hair types. This kit makes keratin hair style for up to 4 months. KHS Keratin Smoothing Straightening Styling Home System Kit is designed and developed by professionals. This great kit guarantees you the same quality as the keratin treatment in the hair salon. Includes a shampoo, treatment and a mask. These products work well together to combat frizz and make her style. KHS Keratin Smoothing Straightening Styling Kit Home System is 100% formaldehyde free.