[Hunker.com] "Polyurethane foam has been one of the materials for crib mattress pads for many year but questions remain about its safety. Evidence shows that it isn't the best material for a baby to sleep on, with health hazards eminently present. Polyurethane foam is no longer deemed safe for babies, as shown by a study published in Environmental Science & Technology.
The manufacturing of polyurethane foam starts with a petroleum base. Various chemical processes create the final product and the chemicals are still in the final product, which a baby continuously breaths when sleeping on a polyurethane foam mattress pad.
According to Healthy Child, typical chemical additives may include formaldehyde, benzene, and toluene. Additional chemicals this material are classified by the EPA as hazardous air pollutants."
Read More:
https://www.hunker.com/13403897/is-a-polyurethane-foam-mattress-pad-safe-for-babies