The Imprinting Hydrogel Mask is a high-quality hydrogel mask formulated with Hyaluronic Acid and Glycerin to provide deep hydration. It is specially designed to boost the efficacy of EGF in BIOEFFECT serums and formulated without ingredients that could interfere with growth factor activity.EGF (Epidermal Growth Factor) is a protein in human skin that signals cells to boost collagen and elastin production to maintain healthy, firm, and youthful skin. The process of delivering EGF to skin cells and activating them is known as imprinting - the most important factor in imprinting is moisture, as EGF prefers an aqueous environment. The longer the surface of the skin is kept moist, the greater the imprinting effect will be, and this unique mask creates the perfect micro-environment to ensure maximum results.