At Night, Your Skin Repairs The Damage It Has Accumulated During The Day, But It Is More Susceptible To Moisture Loss. Up To Half A Liter Of Moisture Is Lost Every Day, And Most Of This Loss Occurs While You Sleep. Moisture Surge Overnight Moisture Mask Intensely Hydrates, Strengthens And Repairs The Skin Barrier To Prevent Dehydration And The First Signs Of Aging. Plus, It Soothes And Calms Stressed Skin.