The core ingredient is a type of micro-diatom called Eternal Inkbone Diatom, a black stramen algae that has lived in the deep sea for more than 2,000 years and is as regular as a diamond. Because its ingredients are originally inky black, Givenchy uses patented extraction technology to extract pure black tiny molecules layer by layer. Therefore, the products in this series are all black, and their precious ingredients and effects are far better than ordinary products.