Hyaluronic acid and collagen. Treated and damaged hair Restructuring mask with hyaluronic acid and collagen for treated and damaged hair. Effectively detangles hair, eliminates frizz and provides immediate softness, leaving hair silky and restructured. Returns shine and luminosity to hair, giving it strength and tone. APPLICATION: After shampooing, apply and style evenly over lengths and ends. Leave on for up to 5 minutes, then rinse.