Joico's K-Pak Reconstructor is an intensive five-minute treatment designed to rebuild and fortify damaged hair. Its formula features SmartRelease Technology, which continuously delivers Keratin, Arginine, and Rosehip Oil to repair, strengthen, and protect strands from styling damage. This reconstructor works by replacing lost proteins and is enriched with Guajava Fruit Extract and Evening Primrose Oil to protect against UV damage and nourish the hair back to health. The treatment instantly improves hair's elasticity, boosts shine, and doubles its strength, resulting in 64% less breakage and a visibly healthier appearance after just one use.