Monster Dryer Balls 6pcs by Woolbuddy. Replace the Disposable Dryer Sheets for Woolbuddy Monster Dryer Balls! - Natural fabric softener; reduces wrinkles and static - Chemical-free, no fillers or synthetic ingredients—a rubber-free, petroleum-free alternative to tennis balls and plastic dryer steamer balls - Decrease drying time by 15-20% (depending on load size) (reusable dryer balls last for 1,000+ laundry loads or 2-4 years) -100% Premium New Zealand Wool SET INCLUDES: 6 Large Dryer Balls for your laundry loads USAGE: Throw all 3 dryer balls into your laundry load. For a large load of laundry, throw in 1 sets