AC Collection trial kit in an easy-to-carry format! The Intensive Kit is designed to treat acne in people with oily or acne-prone skin. COSRX has created its own proprietary centella complex, CentellAC-RX. After years of testing, the COSRX CentellAC-RX formula has been refined to maximize the efficacy of the natural centella ingredient, which not only treats acne but also heals skin damage. STEP 1: AC Collection Calming Foam Cleanser 0.67 fl.oz / 20ml STEP 2: AC Collection Calming Liquid Intensive 1.01 fl.oz / 30ml STEP 3:AC Collection Lightweight Soothing Moisturizer 0.67 fl.oz / 20ml STEP 4: AC Collection Ultimate Spot Cream 0.17 oz / 5g