Treat dull dehydrated strands to the david mallett hair serum a lightweight non greasy formula developed to hydrate soften and protect from root to tip fortified with nourishing macadamia nut oil rich in palmitoleic acid and omega 7 fatty acid the fast absorbing moisturising serum replenishes and strengthens hair from within leaving you with smooth healthy looking locks that are ready for styling defends against sun damage breakage and environmental aggressors whilst adding definit