A3 Clear Action Night Facial Serum 100 ml A3 Clear Action Night Facial Serum to brighten, exfoliate, hydrate and cleanse the skin. Containing 10% mandelic acid (bitter almond extract), this serum is an essential elixir to promote cell turnover, smooth dead skin cells and eliminate fine lines - for a visibly even complexion and radiant skin. The formula also contains aloe vera for a nourishing touch after use.