Repair, nutrients, and protection for damaged hair. System Professional Perfect Hair gives hair volume and improves its structure. The leave-in foam deeply strengthens the hair fiber. Hydrolyzed keratin and amino acids penetrate the porous areas of the hair structure and rebuild the damaged areas. The protective polymers in the Thermo-Resist formula make the hair more resilient to the effects of heat – for strong and elastic hair. Restructures and strengthens the hair. Additionally provides heat protection through Thermo-Resist. Pump foam for damaged and weakened hair. The leave-in foam deeply strengthens the hair fiber with hydrolyzed keratin and amino acids.