With Silk Protein, Biotin & ProVitamin B5 Rebalances & Moisturizes Silk Amino Acids help soothe and moisturize the hair without adding weight. Essential nutrients restore, rebalance porosity and the pH level of the hair, leaving it smooth with a healthy luster. Paraben, Sulfate and Sodium Chloride-Free. UV & Thermal Protectant. Safe for colored, straightened and chemically-treated hair.