At night, your skin uses up to four times more water than during the day. Biotherm brings you a high-performance solution in a signature texture that hydrates, reinforces and retains moisture overnight. Leveraging the breakthrough innovation of new star ingredient P. Antarctica, AQUASOURCE Nuit augments your skin’s water reserves, keeping the upper layers deeply hydrated all night long. When you wake up, your face looks pleasantly fresh and luminous. Best of all, AQUASOURCE Nuit’s benefits are not short-lived. By applying it nightly, your skin’s texture is visibly improved, helping you feel increasingly elastic and beautifully radiant.