After 300 (!) formula iterations cooked up and tested for over two years, the KP Bump Boss finally came to be. Since exfoliation is the key element to tackling the bumps, they included both chemical and physical exfoliants: 10% AHA and PHA, and eco-friendly mineral microcrystals. There are also fruit extracts like Asian plum, apple, papaya, and grape that have different antioxidant, skin soothing, and collagen-boosting benefits. To round out the spa experience, Korean star ingredients like mugwort, barley, and cica are included, which reduces redness and inflammation while soothing the skin and offering protection through antioxidants. (Some KP, like mine, has redness, which the mugwort specifically helps calm.) “Probiotics are included for more resilient skin, and taking advantage of the in-shower humidity and water, there’s hyaluronic acid to draw moisture to skin, and squalane and cucumbers to refresh and hydrate,” adds Yoon.