Cathy Doll Collagen and Hya Sleeping Mask, a firming & moisturizing mask that works while you sleep. This overnight mask is loaded with 3% of rich collagen to keep your skin moisturized, soft, and elastic, while also smoothing fine lines. With 1% niacinamide to control oil and target acne scars, redness, and spots for bright and even skin tone, it contains 5 hyaluronic acid molecules that intensely nourish both outer and inner layer of complexion, helping to retain moisture more effectively, along with 11 types of peptides to fade wrinkles and offer a protective shield, leaving your skin feeling firm, taut, and healthy. How to use: After washing your face, get a generous or a lot of amount of product and apply it to your face and neck. Gently massage until completely absorbed. It can be left overnight without rinsing off. Use 2 - 3 times a week for best results.