*Feature Two different types of composition, gel and powder generates CO2 when it is mixed. It absorbed more effectively into the skin, and then supplied O2. Stimulated the metabolism of skin cell makes your skin bright and more elastic. Naturally removed dead cells and wastes by CO2 Mask Pack makes your skin clear and youthful. For the effect of collagen, sodium hyaluronate, and oat protein acts on the cell of the skin to be more moisturizing.