Vichy Aqualia Thermal Night Spa is an ultra-comfortable, velvety sleep mask infuses the skin with hydration overnight, when skin is most receptive to treatments. Skin is left soft, soothed and smooth in the morning. Feel like you are at the spa with this product! kin feels deeply hydrated, soothed and suppler after just one night. Wake up to fresher, more radiant-looking skin. Formulated with hyaluronic acid and aquabioryl known to replenish the skin with hydration and form a protective film. Best for use with Vichy Aqualia Day Spa Light. How to use: apply thick layer to face and neck before bedtime on clean, dry skin.This is a moisture rich anti aging night cream.