RISM Base Daily Care Black Mask is a Japanese all-in-one sheet mask designed for pore care and skin texture improvement. The mask features azelaic acid derivative and tea tree oil to target oily skin concerns and minimize pores, along with 5 types of vitamin C derivatives and fermented rice extract for brightening and hydration. Made with 100% plant-based cellulose material, this alcohol-free and fragrance-free mask is suitable for sensitive skin. Each pack contains 7 sheets, with recommended use of 5-10 minutes per application.