Magic Felted Wool Dryer Balls - use up to 20% less drying time = 20% less electricity, chemical and dye free, natural fabric softener, earth friendly, natural static remover and they are low maintenance, just leave them in your dryer. Add a few drops of your favorite essential oils to each Magic Felted Wool Dryer Ball for an amazing fresh smell in all your laundry. They are also a great gift idea!