The third step of Joico's K-PAK Hair Repair System, the Deep-Penetrating Reconstructor works to repair and transform damaged hair that's been totally ravaged by heat-styling, colour and chemical treatments, and the environment. Reviving and rebuilding each strand from the inside out, the strengthening treatment helps improve tensile strength and porosity to reduce future breakage and mend weakened tresses. Ideal for dry, fine or curly hair types, the K-PAK Hair Repair System provides you with the most resilient, healthiest-looking, shiniest and manageable hair you can imagine. The fortifying formula features the highest concentration of hair-healing ingredients to power up Reconstructor for optimal efficiency. Keratin, a protein found naturally in hair, actively seeks out damage and helps the repair process by replenishing lost proteins. Smartrelease Technology, an innovative liposome delivery system continuously releases a blend of Rosehip oil, Arginine and powerful antioxidant Guajava Fruit extract to protect strands against harmful external aggressors. Loaded with Omega-6 and Gamma-Linolenic Acid, Evening Primrose Oil offers potent nourishment, transforming stressed locks back to health. For best results, use the Reconstructor in the four-step repair system for locks that feel stronger, healthier and shinier.