Pore Care Cooling Effects Bamboo Charcoal Sheet The Midnight Blue Calming Sheet Mask cools irritated skin and helps clear pores. Pore Purifying: White willow bark extract gently exfoliates and clears excess sebum that clogs the pores. Cooling Effects: With Erythritol that serve as a cooling agent, this mask immediately cools the skin. Bamboo Charcoal Sheet: The black and soft charcoal sheet, which features a comfortable adherence to the face, infuses the skin with long-lasting hydration.