Are mattresses with synthetic foam safe for infants?

What's actually in it

Most conventional crib mattresses are made from synthetic polyurethane foam. To meet flammability standards, manufacturers often treat these foams with brominated flame retardants. These chemicals are designed to slow down fire, but they don't stay inside the mattress.

As the foam ages or breaks down, it releases particles into the air your baby breathes. This includes ultrafine carbonaceous particles. These tiny bits of debris are small enough to enter the body and have been shown to affect the brain during early life development.

What the research says

The science is clear: the materials in synthetic foam can have lasting effects on a child's health. A 2026 study in Sci Total Environ found a direct link between brominated flame retardants and the development of allergies in a nationally representative sample.

The risks extend beyond allergies. A 2026 study in Environ Int looked at how ultrafine carbonaceous particles impact infants. The research shows these particles cause early life sensitization of the brain, changing the brain proteome and telomeres. This means exposure during infancy can physically alter how a baby's brain develops at a molecular level.

Furthermore, synthetic materials are often linked to broader health issues. A 2026 study in Hum Genomics identified specific endocrine disruptors, chemicals that interfere with your hormones, as being associated with chronic respiratory issues. When you choose a synthetic mattress, you are introducing these known disruptors into your baby's sleeping environment every single night.