Missha Pong Dang water mask sheets is a quite big box filled with 30 masks, similar to pack of tissues.
Masks are midwives on top of each other, quantity of essence is quite low, so you can use it for about 10 minutes, because they will dry quite quickly. What is more, quality of mask sheets is also quite bad, like they're not as thick as single one's.
What I like about this masks is that they're quick to use! Perfect for someone who is busy and want to apply some mask before work/school. They gave u refresh effect, also the smell is really soft, reminds me fresh scent of ocean.

THe hydration effect is barely noticeable, but good enough to apply make-up.
I think that the biggest advantage of this product is that it's eco-friendly (30 masks in one box, instead of 30 single masks sheet in 30 packages).
I think I would not buy this product again, mostly because it's not what i wanted. It's good option for people who like to apply mask sheet daily, and in the morning.
It didn't help my skin, and also didn't make it worse.