The Real Water Brightening Black Mask is a specialized facial treatment that appears to be part of a multi-step skincare system. This mask is designed to provide brightening benefits while delivering hydration to the skin. Key features: • Part of a 3-step skincare system • Black mask formulation • Brightening properties • Hydrating formula • 25ml per mask This product comes from JAYJUN Cosmetic and appears to be Step 03 in their skincare system, following a cleansing foam and essence application. The packaging indicates it's specifically formulated for brightening effects. The product volume is 25ml (0.84 fl.oz) per mask.