SurfaceMorph Thickness

Hi, I’m new to grasshopper and rhino. I would like to have solid thickness on my final form after I did surfacemorphing. I couldn’t find a way of having the solid thickness, it came out flat after surfacemorphing. Is that any way to create thickness of it? Please find attached for the rhino and grasshopper file. (7.8 KB)

Here is the model.