I think you brush the entire body while dry-but you use long verticle strokes.
You avoid the face-- just do the rest of the body.
For the face, you can use anything light- even a light make-up powder brush.
I did it this morning after drying from a nice hot Epsom Salts bath.
Wow, does it make you feel good! It gets the glandular fluids and circulation flowing in the right directions.-- which in turn help out the organs do their work.