Using The Grey’s Overnight Sleeping Mask before you hit they hay each night will make sure that while your body is recovering from the days stressors, your skin is doing the same. Packed with a bevy of actives used to treat and repair signs of photoageing, this non-stick mask works to deeply moisturise and replenish the skin. As this is an overnight mask, the formulation will be a little heavier and is best suited to those in need of deep hydration.