All our items and materials are tested to meet the highest global standards and these tests include ensuring that all materials are baby-safe without any harmful chemicals. Formaldehyde is a natural gas found in all wood and every piece naturally contains some very very small level of formaldehyde. No wooden furniture can actually claim to be 100% formaldehyde free but our Cot is 100% true/solid wood that is proven to have the lowest level of formaldehyde vs MDF or Chipboard variants.