This lightweight formula seals in natural moisture overnight to plump your skin. Phelityl indicates Erno Laszlo's unique moisturizing complex with a pH level nearly identical to that of the skin, which maintains the fatty acids essential for skin function. • Nourishes: Seals in vital moisture to repair skin's surface. • Hydrates: Complex emollients attract and bind moisture. • Soothes: Lightweight, non-greasy formula leaves the skin feeling smooth.