Round Lab Birch Mask Pack

I tried it once as a free shipping trial and liked it so much that I have continued to purchase and use it ever since. Perhaps because it contains birch sap, it keeps the skin moisturized for a very long time, and it doesn't dry out even if I leave it on for over 20 minutes (but please don't leave it on for too long; it's not good). It is non-irritating and feels like it replenishes moisture to the skin, so I use it almost as a daily mask pack when my skin is dry. Since it is the rainy season these days, I don't use it every day, but only about 1-2 times a week. Because the indoor air conditioning makes it dry, I realized I definitely need to use a mask pack in the evening.