Prep your skin for the day ahead with Kiehl's Ultra Facial Overnight Hydrating Face Mask with 10.5% Squalane. From the same line as the brand's cult-favourite cream, this formula nourishes your visage by helping to replenish its water reserves for long-lasting hydration. Infused with fountain plant, glacial proteins and desert plant extract, it ensures you wake up feeling positively refreshed.