Korres Yoghurt Probiotic Superdose Face Mask 100ml A probiotic face mask with real Greek yoghurt that rehydrates, reduces redness and rebalances skin’s natural protective layer, in just one use. Slather a super thick layer on dry, cleansed face, avoiding the eye area. Leave for 10-15 minutes rinse off thoroughly. Use as needed 2-3 times per week. For use overnight, apply a thin layer before bedtime in place of your moisturizer. Keep the mask in fridge for an extra cooling sensation.