You may be tempted to send your workout sports jackets to the dry cleaner along with other clothing made from delicate fabrics, but don't do it. The chemicals used in dry cleaning can break down the water-repellent properties of sports jackets and defeat their purpose of keeping you warm and dry. Since sports jackets aren't worn next to the skin, they don't need to be washed after every workout. But when they get sufficiently dirty, wash sports jackets or vests on the gentle cycle of the washing machine with cold water and use a gentle cycle detergent, such as Woolite. Then hang them to dry for about an hour and you'll be ready for your next workout.