Nourishing Sleep Mask - Oh K! Nourishing Sleep Mask with Hyaluronic Acid is an overnight, hydrating gel cream mask that quickly absorbs while you catch zzzs. Deeply hydrates and helps nourish the skin leaving you with fresh skin in the morning.BenefitsHydratingNourishingFeatures50% PCR BoxKey IngredientsCeramides - helps to retain moisture and protect skin against environmental stressors.Hyaluronic Acid - draws water from the air to hydrate the skin. - Nourishing Sleep Mask