Lay the jacket out on a flat surface. Turn the collar down and button the top and bottom buttons of the jacket. Leave the other buttons undone to save time.
Pick up the jacket and hold it by both the shoulders with the buttons facing you. Fold the jacket in half along the buttons, keeping the buttons at the front. The sleeves should be in back now.
Turn the jacket to the side and pinch the shoulders with one hand. Run the other hand down the sleeves to align them. Fold the pair of sleeves diagonally across the jacket, then fold the sleeve pair in half upon itself.
Lay the jacket on a flat surface and begin rolling the jacket from the collar down. The bottom cuff of the jean jacket should be exposed when you do this properly.