Natracare Ultra pads are made from only certified organic 100% cotton and renewable and sustainable plant cellulose. They are totally plastic-free, and like all of Natracare products, are totally chlorine-free because Natracare never use chlorine bleach in any of their production processes. Being plastic-free means Natracare does not contain any polyethylene, polypropylene or polyacrylate super absorbents, all of which can irritate the skin.