Unused. Stored since purchase. For someone who will use it. [Product Details] This serum contains highly moisturizing ingredients to keep the skin hydrated. Brand: FOR DAYS [Product Overview] Mousa LU. Serum tia is a serum that can be expected to give the skin firmness. With a capacity of 50ml, it is perfect for daily skincare. By applying an appropriate amount to the skin, you can feel a firm sense of firmness. It is especially recommended to use it intensively on areas where dryness is a concern.