We love these 100% wool balls for your dryer ! Their purpose is to help circulate the hot air more evenly to essentially help reduce your drying up to 25%. The more dryer balls you add, the more drying time you save. We recommend to start with 3. This is a plastic-free and packaging free alternative to current fabric softeners in the market. To add scents to your clothes, simply add 2-3 drops of essential oil on them and toss in your dryer. Other benefits are they help reduce wrinkles, remove static and last up to 1000 cycles. 100% biodegradable & compostable. Made in Canada