• MamaSuds Wool Dryer Balls are handmade 100% wool, unscented and from Michigan. • They can reduce drying time by 25-40%, soften clothes, and reduce static. • They work by circulating air in the dryer and the more balls used, the better their effectiveness. • Traditional dryer sheets contain ingredients linked to cancer, respiratory tract irritants, central nervous system disorders, neurotoxins, and hazardous waste. • Using dryer balls is a great alternative to conventional dryer sheets.