Made of 100% New Zealand wool, the dryer balls are reusable and environmentally friendly. This pack contains 3 balls that can be used for 1000 small to medium size loads of laundry. Simply place the wool ball in the dryer to help reduce drying time, prevent wrinkles, and save energy. Your clothes will look good and feel great with these biodegradable, fragrance free, ethically sourced wool dryer balls.