The Oh K! Marine Algae 3-Step Mask harnesses the power of the sea to hydrate and protect the skin, and help you to achieve a "Mul-gwang" (super dewy and hydrated) finish. The cleanser, mask and serum are all formulated with a blend of 4 antioxidant- and nutrient-rich algae extracts, to help nourish and smooth the skin. The fibre sheet mask is soaked in the nourishing skincare essence to lock in moisture and help to deliver a supercharged boost of the skin-hydrating ingredients. The serum finishes the routine off with a boost of hydration with skin-plumping hyaluronic acid, hydrating pro-vitamin B5 and firming Gotu Kola extracts.