Curved angle of Barcelona Chair Cushions

We can make Curved Angle on Barcelona Chair Cushions

You may even not notice this, but we are indeed able to make the Barcelona Cushions with a curved angle instead of being level (The back cushion).
However, this curved angle is not necessary, because when the cushions are used for a while, it will have a curvedangle naturally due to the strength on it, and this curve is naturally close to the body shape of the user.
So if not requested, we don't hand-make this curve on the back cushion, but let it happen naturally.