Cut fabric to shape.
Fuse stabilizer fabric to the outer fabric.
Sew each zipper side along the B+2C sides of the pattern.
Sew D side to the ½ D plus ½ D sides on the same side of the piece on the wrong side.
Sew the C+C side to the corresponding A side on the wrong side of the piece. This will be done four times.
Flip project inside out!