These bags rock! Our family and friends have used them for years. I've made them and used 100 % cotton fabric, cotton batting and unbleached muslin for the inside. To get them 'fluffy' and yummy- wrap a damp paper towel around the outside of the washed potato before putting it in the bag. They are also great for corn on the cob. My friend uses her to cook sweet potatoes. What great gifts they make :)