CosRX, which stands for Cosmetics + RX (prescription), aims to minimize skin troubles by using only the most optimal ingredients and eliminating fillers. The result is safe, natural, and effective skin care at an affordable price point. The cult-favorite Acne Pimple Master Patch flattens pimples overnight. Some of its bestsellers for oily skin types include the low pH Good Morning Gel Cleanser and BHA Blackhead Power Liquid. For dry skin, check out the Advanced Snail 96 Mucin Power Essence for hydration that packs on the punch.