ClearCalm3 clarifying clay cleanser by REN . Part of REN's ClearCalm3 system, the antibacterial cleanser uses purifying French clay to absorb excess oil, while zinc gluconate reduces the production of sebum, mayblossom tones enlarged pores, exfoliating and unclogging the skin for a clear complexion. To apply, gently massage one pump onto the face for one to two minutes then rinse off with warm water.