These dryer balls may change your laundry life. You will no longer need those petroleum based dryer sheets. Just put these in your dryer and they will help your laundry dry more quickly and lessen the static cling too. They are made from 100% wool grown here on the farm. The packages in natural color are a Certified Fibershed Product. If that is what you would like just add fibershed to the comments section in your purchase.