Lay the sportcoat out flat with the outside facing up.
Push the collar up to lie flat.
Bring each side edge of the jacket to the front center, meeting the lapels at the middle.
Fold the sportcoat in half lengthwise along the vertical center line of the back of the coat.
Fold the sportcoat in half widthwise by bringing the bottom edge up to the collar.
Place the folded sportcoat inside the suitcase.