Kérastase Nutritive Crème Magistrale, 150 ml, Hair Balms and Lotions for Women, The Kérastase Nutritive Crème Magistrale hair mask is an essential step in your hair care ritual. Give it a moment to regenerate and it will repay you with vitality and beauty. Characteristics: moisturises intensely makes it easy to comb through and prevents damage gives hair a brilliant shine hair is soft to the touch restores hair structure How to use: Wash with shampoo, then apply to damp hair. Leave to act as instructed on the packaging, then rinse thoroughly.