A few months ago I purchased and began using three different types of wool dryer balls. What are wool dryer balls? They're large balls of wool used with every load you throw in the dryer. They replace dryer sheets and help reduce dry time!! The latter is my favorite part, and they do work. I can dry two sets of queen size sheets in one cycle if I disperse the balls throughout the sheets when I put them in the dryer. It's recommended that you use about a dozen wool dryer balls at a time. Also, if you're allergic to wool, you can still use these because the wool isn't being directly applied to your skin.
First are the Woolzies Dryer Balls.
These are the largest and best priced of the three types I got, and for those reasons, they ended up being the best value. They appear that they'll hold their shape and quality. Today they're on sale at babysteals.com for $19.99 per box (6 dryer balls). They're also handmade from New Zealand wool, helping providing a sustainable living.
Second are Buddha Bunz dryer balls.
A cool feature of this product is that you can choose the color(s) you want and a scent. The scent subtly transfers to your clothes while they're being dried. You can also get them unscented. These are handmade by a WAHM. These seem like they'll hold up well, but they're not as big as the Woolzies, though they're a little more dense, so they're probably equally effective. It also may take a month or more for you to receive your order. I purchased the "Special" which is three balls with a scent of your choice but not color of your choice for $18.
Third, and my least favorite, are Pepper Jack Home dryer balls.
I purchased these on sale: four for $9.99. I'm really glad I didn't pay more for these because they're not worth it, unfortunately. They're considerably smaller and less weighty than the other two brands I got, so I don't recommend them. They're also collecting a lot of lent and don't seem like they'll hold up as long as the others.
Here are three types next to each other, so you can see the size difference more clearly: