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Cosrx Snail Mucin 96% Power Repairing Essence ($13, originally $25)

If you have dry, irritated skin, this viral essence will help douse your skin with hydration. It soothes redness, brightens the skin, and helps repair your moisture barrier, without leaving it feeling greasy. Read about one editor's experience with the product in her review of the Cosrx Advanced Snail 96 Mucin Power Essence.

Editor Quote: "It's been a month since I started using the essence daily, and I am a complete convert. Though I was worried the additional skin-care step would clog my pores over time, leading to pimples and what have you, my skin's texture has actually improved, and it feels way more even now. The hydration payoff is also huge, and I feel like it actually helps my moisturizer work better, too." — Kelsey Garcia, lifestyle director