Includes 4 x dryer balls reduces drying time by 30% bag for storage included a nifty way to combat long dryer usage, and get your favourite top back in no time! The wool dryer balls from again work by separating laundry and keep air flow circulating through every cycle, reducing drying time by 30%. It includes a handy storage bag with a drawstring seal to keep items ready for use.care instructions machine washable. Will last 3 5 years depending on frequency of use. Can be composted. Once washing is dry, simply place the balls back in the pouch for storage. Place dryer balls into the dryer with your laundry and set to the appropriate drying cycle. As the balls reduce drying time, for the first time using, it is recommended to monitor the drying cycle to prevent over drying.