1 Face Mask – 28 ml / 0.95 fl. oz. Problem, Acne Skin. Offer a sense of calm to stressed, irritated skin with Karuna Clarifying Face Mask’s exclusive serum featuring of shiso leaf, ginger and honey. Karuna sheet masks help restore skin’s vitality by pushing serum deeper onto the skin surface where ingredients are needed the most. The mask + serum duo offers so much more than serum, clay or gel does on its own.