Brush any dirt off your jacket. Zip and button it, then close the fabric fastener.
Place your jacket in the washing machine and add 5 ounces of non-detergent cleaner to the washing machine. Set the washing machine on its lowest temperature and start the washing cycle.
Reproof the jacket using a waterproofing wash-in. Add 5 ounces to the washing machine after the machine has filled with water.
Hang your jacket to let it air dry. Do not use a dryer.