Write an article based on this "Turn the jacket inside out. Set the washer to cold and use the gentle cycle. Wash the jacket by hand if you prefer. Lay the jacket out flat to air dry."
Button the jacket with the inside out. That will help protect the leather from the washing machine. You can also add other similarly colored items to the machine in an attempt to cushion the jacket. Washing a jacket in the machine should be a last-ditch effort. It can ruin a leather jacket. Wool shouldn't be washed in hot or even warm water, so set your washer to cool. Turn it to the gentlest setting you have. Also, set it up to only rinse once, and put it on the smallest load possible. Add a couple of tablespoons of a gentle wool detergent. Also, skip the spin cycle if possible. Add the detergent to a sink with water, and gently swirl the jacket in. Try not to agitate it. Rinse it by putting it in the same sink with clean water, preferably at the same temperature. It's likely best to air dry the jacket by laying it flat. First, wipe down the leather to dry it out as much as possible. Lay the jacket on a towel with the inside out so it can dry properly. It may help to blow dry the lining a bit to dry it out. Some people recommend drying the jacket inside-out in the dryer on medium. However, that could damage the wool. If you do, be sure to check it every 10 minutes or so. You may need to stretch the sleeves a bit as it dries to make sure they stay the same length.