Snail Smooth Firming Mask

I was really skeptical about this mask, and honestly I'm not sure I saw much firming from it - I think it's something you'd have to use regularly and not just once -, but after using it my skin was...

I am a big fan of this mask. This is always my first choice whenever I storm to any Etude House branch to buy a mask. There was even a period when it was sold out in 2 branches and had to wait for...