Living Proof Restore Repair Mask is an intensive treatment designed to repair and strengthen damaged hair. Its silicone-free formula works deep within the hair fiber to restore softness, resilience and shine for healthier-looking hair. Helps repair and strengthen damaged hair Deeply nourishes without weighing hair down Leaves hair softer, smoother and shinier HOW TO USE After shampooing, apply generously to clean, towel-dried hair focusing on mid-lengths and ends. Leave on for several minutes then rinse thoroughly. Use once or twice per week or as needed.