Wool Dryer balls, this 6 pack comes with a storage bag. To replace your fabric softener, just put them in the dryer, and they'll even the heating, reduce wrinkles, and for that fresh laundry scent you can add a couple drops of essential oil to your ball and the perfume will release as the dryer heats. To change scents simply throw them in the washer. These balls are amazing for towels and keeping comforters fluffy all year long. Never buy fabric softener again.