Facial essences act as a hydrating primer, using active ingredients like snail mucin and fermented yeast to prepare skin for subsequent products and enhance moisture absorption. Top recommendations for lightweight hydration include the K-beauty staple COSRX Advanced Snail 96 Mucin Power Essence for barrier repair and the luxury SK-II Facial Treatment Essence for improving texture. Explore expert-rated options and their benefits for different skin types in the original article from Allure . Go to product viewer dialog for this item. SK II Facial Treatment Essence