wow! I just used a sample of this product and it was AWESOME! First of all, it's like black oozy alien mud.  Then you put it on, it seals so tight you can't move your face, and then you wash it off- and it's amazing!  Seriously- it's from Japan and is a skin-brightening mask.  And it works. 
Buy it at Bath & Body Works

Seikisho Mask White A peel-off, airtight black mask that effectively removes dirt and impurities to dramatically increase skin’s clarity and radiance. It also suppresses melanin production and prevents the formation of aging spots and freckles. • Suppresses melanin production to prevent sun spots. Take about 1 inch from the tube at a time and spread over skin. Repeat until entire face is covered with a thick layer, avoiding the eyes, eyebrows, hairline and lips. After 20 minutes or when completely dry, peel off from the outside. Herbal Extracts: Coix Seed Extract, Angelica Extract, Moutan Bark Extract, Japanese Coptis Extract, Artemisia Capillaris Extract 75mL/2.7 oz. $28.00 Kose-USA