[rbanffy]

Depends on how much water. If it was designed to fold into a chair shape when exposed to normal room humidity, you'd remove it from the hermetically sealed bag and it'd spontaneously (over, I assume, many hours) fold itself into the intended shape.

[Sohcahtoa82]

"normal room humidity" is extremely variable.

[rbanffy]

There is certainly a range that can be considered "normal" however broad.