Product review (5 stars): Make less noise than other types and really work
I love these things.  For some time, we have used dryer balls to decrease wrinkles and drying time.  They work.  I started with the completely round and harder ones, the ones with little bumps all over them, but they made a lot of noise and broke in half after some time.  This design makes much less noise and cannot break.  And yes, they decrease wrinkles and drying time.  For reals.  I use five or six of them in the dryer all the time.

The only problem I have with any dryer balls is keeping them in the dryer.  They have a habit of sneaking into pockets, long sleeves, and the corners of fitted sheets.  This being so, I had to buy four or five sets and only have five or six in the dryer at one time; they others are hiding in large blankets and show up on their own, sneaky little things.

Yes, you should buy these if you they are in stock.