Nellie's All-Natural Lamby Wool Dryerballs. Our newest addition to the dryerball family is made of 100% pure New Zealand wool, acting as a soft and silent natural fabric softener. Add in a Nellie's All-Natural Scented Dryerball for a fresh, natural laundry experience.. The dryerballs come in a reusable tin that doubles as a piggy bank, that way you have a place to save the money from using less energy drying.. HOW TO USE: Toss 4 dryerballs into the dryer to reduce drying time, soften fabrics and reduce wrinkles. Separate natural fabrics from synthetic fabrics to help reduce static | Nellie's Lamby Wool Dryerballs Size 4 pack