Includes FREE Bonus NaturOli USDA Organic Large Soap Nuts Sampler. Our Jumbo Wool Dryer Balls are a fabulous environmentally friendly, all-natural laundry aid. The quintessential combo when used with soap nuts. Enjoy a totally natural laundry room. Will not get tangled in clothes like "tennis ball" size balls being sold by most. (Note that few brands provide specifications) Our Jumbo-sized Wool Dryer Balls shorten drying time (saving energy) while softening and fluffing laundry to help reduce static. Many users reduce dryer temperature - saving energy while being gentler on fabrics. Hand felted. No synthetic materials or chemicals are used. They will not unravel with normal use. It will last for years.