The theory behind how dryer balls work (wool ones, in particular) is that they can help prevent laundry from clumping in the dryer. The balls also retain the heat they receive from the dryer and therefore boost the drying process. ... Additionally, wool dryer balls help to soften fabrics when used in the dryer.

Do wool balls in the dryer really work?

Short answer: yes they do! Dryer balls can dramatically reduce your drying times (sometimes even by 25%!!), they soften clothes, and, if used correctly, they reduce static in your laundry. Wool dryer balls are especially great, because they work silently (contrary to plastic and rubber balls).

Why do people use wool balls in the dryer?

Dryer balls are most commonly made of tightly compressed wool, but can also be made of plastic or rubber. They help prevent laundry from clumping together in the dryer by tumbling between layers and separating fabric. This action allows warm air to circulate better which can even help reduce drying time.