Hold the centre of the collar at the top with your left hand so that the back of the jacket is facing you. Fold the right side back to the coats middle seam.
Grab the right sleeve by the inside lining at the shoulder seam and pull it out so that the shoulder is now inside-out.
Smooth flat the right sleeve while making sure that the right side of the jacket is hanging down fairly straight.
Then tuck the left shoulder into the right inside-out shoulder. They should fit together snugly, and make sure the two sides are well aligned.
Position the left sleeve flat on top of the right sleeve.
Smooth out any remaining wrinkles making sure everything is nice and flat.
Then depending on the available space in your bag you can fold the jacket in thirds or in half. But make sure you do it from top to bottom not side to side.
Upon arrival the fold-lines should fall out after the jacket hangs up a while. Alternatively, you can hang it up in the bathroom with the shower on for a few minutes; the hot water will steam out the creases.
