I was keen on trying out dryer balls to do away with the chemicals of dryer sheets. It seems as though the balls do manage to fluff up the clothes due to the mechanical action. I actually used a different brand than this one - one with some patches meant to reduce static. The static reduction seemed to work too, since there was none on the clothes.The claims of reducing drying time, didn't seem to bear out. Clothes seemed to take the same amount of time to dry.I had to discontinue using this once I discovered that it damaged flannel sheets. The sheets were left with the flannel bunched into bumps rather than the soft feel that it had before. This is obviously due to the mechanical beating that the sheets gave it. I should have realized that the mechanical action will damage fabric.I suggest avoiding this product and sticking with dryer sheets.