The 3-step mask is a product that allows you to easily complete your skin care routine by simply using it in the correct order. Plus, you only need one, so it's perfect for traveling and doesn't take up much space! It's also perfect for trying out. Collagen leads to "soft and elastic skin". The stringy, stretchy serum in step 1 makes your skin moist just by applying it! If you use all three, your skin will be shiny and radiant! I was so impressed with how well my makeup went on after using this.