Dryer balls made from 100% felted alpaca fiber that can be left in the dryer continuously have multiple benefits: Dry clothes faster and more evenly. Help soften laundry; the mechanical effect of the ball hitting the laundry helps it regain its suppleness. Diffuse a pleasant scent without chemicals; simply add one or more drops of essential oil of your choice to diffuse the scent into the laundry as it dries.