cosyhousecollection wool dryer balls naturally soften and freshen laundry. Sourced from humanely sheared New Zealand sheep, these dryer balls are hand-felted, biodegradable, and free of dyes, chemicals, and fragrances. They help reduce static, wrinkling, tangling, and drying time, making laundry a breeze. Unlike traditional fabric softeners, these wool dryer balls last for up to 3 years.