Yes they really do work!
These Wool Dryer balls separate clothes, allowing hot air to circulate more evenly and efficiently, which then reduces drying time. The wool from the dryer balls is great for removing threads, hairs and static, in fact they are so absorbent they can further reduce drying time by 10 to 25 percent.
Don't use plastic, rubber or tennis balls that a release a nasty burnt rubber smell lingering in the air, inside your dryer and on your clothing.
The Golden Wool Dryer Balls will not make loud banging sounds or damage your dryer when they are in use.
They come 6 to a bag and these are the XL size.