I recommend this face mask.

I tried this after getting a recommendation from another online community because it's famous. It's an Abib mask pack. Have you heard of the "Gumdrop Pack"? It normally costs 2,000 won, but if you buy it during a sale at Olive Young, you can get it for half price, 1,000 won. The moisturizing effect is truly different from other masks, so I've been using this one every day.