Alpaca dryer balls are an eco-friendly option to reduce drying time, static electricity and wrinkles. By using 3+ balls per dryer load, clothes get softer without any residual chemicals left on fabric. Alpaca is considered hypoallergenic so there is little worry in using this natural fiber.  Plus they may be used over and over again; getting better as time goes by.
FYI - If you haven't used dryer balls before, prepare for some noise. They will bounce around but that means they are doing their job.
Dryer balls are sold in a 3-pack of assorted colors each.