Use these in conjunction with a clothes-line to reduce your carbon footprint considerably.
"Designed to reduce drying time and soften fabrics without the use of chemical fabric softeners, Dryer Balls are an eco-friendly solution to landfill-clogging dryer sheets and chemical-laden liquid softeners. As your wet laundry tumbles in the dryer, these bumpy balls lift and separate fabric to make it soft and fluffy, and allow air to flow more efficiently proven to make ironing easier, decrease lint and reduce drying time up to 25%."

Amazing duo tumble in dryer to separate laundry, allowing hot air to flow more efficiently. Mini fingers massage fabrics to fluff up and soften them without chemicals.

We've had these for about a year and they are needing replacing. HOWEVER, my sheets and towels have never been softer.

This is a really cool concept. These spiked balls tumble around in the dryer with your clothes, lifting them up and separating them. This allows for better airflow which softens your clothes and can reduce drying time by up to 25%. Great, chemical-free way to soften your clothes.

If you are part of the growing group of people going "green", here's a product you might be interested in. These dryer balls are added to a load of clothes in the dryer in order to lift and separate clothes as they dry. This action reduces static, has no chemicals, and cuts down on the possibility of wrinkles forming in the dry cycle. No more dryer sheets necessary, therefore less waste and less money spent. (via Linens and Things)

The question is...do they work? You bet they do! (via Delight store)

These Nellies's Dryer Balls will make the neatest Stocking Stuffer or Hostess Gift! As thesethese little pastel blue balls tumble around your dryer, they separate and soften fabrics, thus reducing drying time. Guaranteed to last 3-5 years! Can be purchased at Delight.com for $17.50. (via delight.com)

It seems like everyone is trying to find ways to save a buck, but who would ever think about saving it in the dryer? These amazing and magical Dryer Balls, actually cut drying time 25% while softening your fabrics and ironing out the wrinkles. (via Delight Store)