Our niacin and Vitamin C whitening mask (bagged) is carefully formulated with collagen, niacinamide and ascorbic acid. Designed specifically to provide the necessary nutrients for the skin. The usage method is extremely convenient: Thoroughly clean the facial skin, take out the mask, apply it to the facial skin, let it stand for 15-20 minutes to allow the essence to be fully absorbed, then remove the mask and wash it with clean water. And it can significantly enhance the skin's luster.