With WOW Skin Science Apple Cider Vinegar Hair Mask, dull, limp, and dandruff-prone hair will regain its hydration and smoothness. especially designed to stop flakes and give weak hair back its strength and elasticity. Argan oil, wheat protein, apple cider vinegar, and sweet almond oil all work to hydrate hair strands, soften rough cuticles, and create voluminous volume.