Deep Hydration : The oligo-hyaluronic acid found in the Bio-Collagen Real Deep Mask has a moisturizing effect that is superior to that of regular hyaluronic acid. It quickly hydrates the skin's surface and penetrates deeper layers of skin resulting in a healthy and moisturized A 28g Real Collagen Mask : 500 Da molecular collagen absorbs into the skin easily that is superior to that of regular collagen, ensuring thorough absorption and maximum effectiveness Hypoallergenic : This deep hydrating facial mask is formulated with non-toxic & non-irritant ingredients. It is free of allergic reaction-causing ingredients and 19 other harsh, controversial ingredients. It is completely safe for sensitive skin Overnight Mask Sheet : After 3 hours, the collagen hydrogel mask sheet is absorbed into the skin, becomes transparent. This mask can be used as an overnight mask, providing easy elasticity care while you sleep