Collagen Sleeping Mask contains more than 40% hyaluronic acid, which can instantly replenish the moisture lost by the skin during daytime, and maintain the moisture level well throughout the night.  Adding vitamin B3 and marine collagen peptides not only has excellent whitening effect, but also highly moisturizing, increasing the proliferation of epidermal lipids and proteins, locking the skin's moisture barrier, reduce wrinkles, and making the skin elastic after use.