Boots Ingredients Repair Mask With Niacinamide 200 ml. Great for damaged and dry hair. What is it? This hair mask contains niacinamide and plant protein which works to replenish moisture and helps to restore the look and feel of dry and damaged hair. What is it good for? – Improves the appearance of split ends and helps protect against hair breakage – Hair feels soft and strong whilst looking smooth – Hair looks healthier with improved manageability – 100% Vegan How to use: Once or twice a week after shampooing, apply to clean wet hair and comb through. Leave on for 5-10 minutes. Rinse out thoroughly.