I've always seen dryer balls in the store but for some reason I have never tried them. I finally took the plunge with these wool balls and am pleasantly surprised with how well they have worked. You don't have to use fabric softener with these puppies and so now I am not adding any chemicals to my wash loads which is always my top priority. These balls significantly cut my drying time as well so take that Al Gore! There are multiple products out there consisting of different materials and configurations. It just so happens that I chose wool because I can drop a few of my essential oils right into the material and add whatever I want to each load! Click here to look at the ones I bought and let me know what you think if you decide to use them.