Tumble dryer balls are balls made of 100% natural wool and it's a clever, cost-effective and sustainable option to fabric softeners and plastic dry balls. They will cut your tumble dry time and remove static electricity. Since the balls make your fabrics softer, there is no need for a liquid fabric softener. The balls will last for 3-5 years.
How to use them then? Well, place all four balls in the tumble dryer together with the wet, clean laundry. Easy as that!
Please note that they should not be used in the washing machine, only the tumble dryer (hence the name) and if you have a combined washing-and tumble dryer machine then remember to remove the balls after use.