Paul Mitchell Strength Litre Duo will reconstruct and protect hair that has been damaged by chemical, environmental or heat styling. The Super Strong Daily Shampoo and Conditioner help to prevent damage from sun exposure, preserve the natural strength and protect the surface for more shine. It is formulated with Paul Mitchell's Super Strong Complex, which penetrates deep into the core of the hair to rebuild from the inside out. Canola, soybean and cornstarch help condition and lock-in moisture for soft, supple yet strong hair. Try Paul Mitchell and you will see why this is one of the bestselling hair care brands of all time.