Milbon Highly Nourishing, Soft and Damaged Hair Repair Baking Oil (Pink Diamond) (9g x4) This Step 4 is the fourth step of Linkage salon repair. It is used once a month in the salon after the monthly care of step 1.2.3, starting every other week. The hair mask you get on Monday to maintain the salon effect can be used alone. It is not an ordinary hair mask but contains collagen to make your hair healthier and smoother. The specially formulated collagen can repair the peeling moisturizing film after care, keeping the hair smooth and elegant. Diamond shape: Suitable for normal hair and thick hair with dry and curling ends. Helps to soften and smooth the hair, giving the hair more moisture and nourishment.