ZO Complexion Renewal Pads are pre-soaked, which will dissolve any impurities on the skin. Impurities can include pollution or build-up of dead skin, for example. They help to minimise surface oil by achieving a deeper exfoliation within the cell. Dead skin cells can clog the pores and the Complexion Renewal Pads offer a deep cleanse to congested skin and release any dirt to prevent breakouts. These pads contain salicylic acid, glycolic acid and a botanical blend.