It Organic Cotton Rounds are made with 100% Certified Organic Cotton. Along with being grown organically, this cotton is whitened and disinfected with Hydrogen Peroxide instead of Chlorine to avoid creating harmful chemical Dioxin residues. Maxim steers clear of using any irritating materials like Petrochemical byproducts, Viscose Rayon or Perfume found. All of these qualities combined, make these cotton rounds Hypoallergenic.