Hyaluronic Acid draws moisture from the environment into the skin layers, but can actually pull moisture out of the skin in dry climates if not sealed in. Lumi White Cream acts as the occlusive and active layer that locks in that hydration while simultaneously delivering Alpha Arbutin, Vitamin C, and Glutathione for brightening. The serum-then-cream layering is the correct application order and maximises both hydration retention and brightening efficacy.