The feature of this facial wash is its O2 (oxygen) bubble cleanser. This foam cleanser also contains LHA, and using it before LALAFIL can balance the pH and maximize the peeling effect. Washing with fine bubbles containing oxygen can be expected to deeply cleanse pores and remove dirt. This facial wash uses a brush because human hands have resident bacteria, and the brush prevents bacteria from being applied to the skin before peeling. It is a weakly acidic and low-irritation facial wash, so it can be used by people with any skin type.