These masks are really thin, hence the name, 0,2 mm thick and transparent. Because they are really thin, they are quite difficult to fold out.
When reading about the 0.2 mm it says it is supposed to be light and comfortable as air. Hmmmm if you ever had a sheet mask on your face you know that it is not light as air (since it is drenched in product and your face is completely wet (not so air like, is it?).
On the comfortable side, well, no sheet mask is comfortable, but it is still not uncomfortable. Do you know what I am trying to say here?