Hair that has been overly processed, chemically treated, medium to coarse, and severely damaged is recommended to use L'Oreal Pro Fiber Rectify Shampoo. Make sure you follow the entire program at home to reap the long-term benefits of your in-salon treatment. Along with the Pro Fiber Recover Conditioner, it should be used daily. Make sure to use the Re-charge Booster instead of conditioner after the fourth wash to prolong the treatment's shelf life by up to six weeks. Hair will appear shiny, feel stronger, smoother, and softer right away. Make sure to use the Pro Fiber Recover Leave-in to finish the program.