Lanza KB2 Hair Repair Leave-In Protector is a protein-rich formula that restores health to hair that has been weakened by chemical damage, thermal abuse and over-exposure to the elements. Lightweight and quick-absorbing, it protects hair from UVA/UVB rays, heat , pollution and external stresses. KB2 (Keratin Bond System 2), Revitalizing Botanicals, and Antioxidant Vitamins A, C & E repair, replenish and renew, resulting in improved health and shine.