Wool Dryer Balls by MarvelousRule , 6 Pack XL Organic Wool, Non-Toxic, Reusable, X-tra Large. Reduces Drying Time and Chemical-Free. Natural Fabric Softener(3PC Grey + 3PC White) Includes (8) - Blue Dryer Balls They can make your clothes fluffier and reduce wrinkles without the use of harsh chemicals. Soften your clothes naturally with Mainstays Dryer Balls. Mainstays Dryer Balls make a great, eco-friendly alternative to dryer sheets or liquid fabric softener. These durable dryer balls are made of a non-toxic material.