100% pure lavender essential oil, therapeutic grade Aromatherapy oil Relaxing and uplifting Woolzies Pure Essential Oils can be used therapeutically. In addition they are the perfect way to add fresh scents to your laundry! This natural aromatherapy product can be simply added to our Woolzies dryer balls to create a heavenly scented load of laundry. After the laundry is completely dried, add desired amount of oil to the dryer balls, toss them back in the dryer and run on an Air Fluff (non-heated) cycle for 10 minutes. You will find your laundry smelling fresh and delightful!e laundry is completely dried, add desired amount of oil to the dryer balls, toss them back in the dryer and run on an Air Fluff (non-heated) cycle for 10 minutes. You will find your laundry smelling fresh and delightful!