Clarins Hydra-Essentiel Bi-Phase Serum moisturises and quenches the skin. It instantly hydrates, plumps and smoothes the skin, day after day. The skin is strengthened, more radiant and remains visibly hydrated. To use, apply to the face and neck morning and night. Shake the bottle before use, then warm the product in your hands and apply from the centre of the face and neck outwards.