This mask from L'Oréal strengthens the hair. Its reinforcing formula is enriched with supplements: biotin, vitamin B5 and arginine that work with the hair fiber from the roots to the ends to act as a light barrier, protecting and strengthening the hair. Ideal for weak and fragile hair. that tend to break and fall out.It can be applied both on the scalp or on the strands. It is very light and without silicones so it will leave hair hydrated and moving.