The Biolage Smoothproof Deep Treatment Pack is a restorative hair mask for frizzy and unruly hair. Use this mask once a week to make your hair smoother and reduce frizz and static. The hair is intensively nourished and cared for with this hair mask, so that stiff and damaged hair can recover. This is due to the working ingredients camellia flower extract and castor oil. The hair becomes more manageable and hair breakage will be reduced.