Overnight deep conditioning hair mask for dry, damaged hair. Mizani Strength Fusion Intense Night Treatment 150ml is an intense overnight hair mask treatment formulated with shea butter and vitamins to dramatically strengthen dry, damaged hair.This damaged hair treatment works while you sleep to fortify and nourish dry, stressed hair, leaving it smooth and strong by morning. It contains patented anti-breakage technology to help protect and prevent against split ends and breakage.