A rich Kérastase hair mask is designed as a nourishing split ends treatment and is enriched with Hyaluronic Acid and Edelweiss Flowers Extract to reconstruct post-bleach hair, reduce split ends and enhance the resilience of the hair fibre. For hair that is +97% more hydrated and with -63% split ends. HOW TO USE: STEP 1 Apply the Kérastase hair mask to damp hair. STEP 2 Leave in for 5 minutes. STEP 3 Rinse.