Do foam play mats for babies release toxic chemicals?

What's actually in it

Foam play mats are usually made from EVA foam (ethylene-vinyl acetate) or polyethylene. These materials can contain leftover chemicals from manufacturing, including plasticizers, foaming agents, and colorants. As the mat sits in your home, especially in a warm room, these chemicals slowly escape into the air as gases. This process is called off-gassing.

Babies and toddlers spend hours lying on, crawling over, and mouthing these mats. They breathe the air right at floor level, where gas concentrations tend to be highest.

What the research says

A 2025 study in Ecotoxicol Environ Saf used non-targeted chemical screening to identify every volatile compound released by children's play mats. Instead of just testing for a known list of chemicals, the researchers cast a wide net to catch anything the mats gave off.

They found dozens of volatile organic compounds, including solvents, plasticizers, and fragrance-related chemicals. The researchers then ranked each one by toxicity and exposure potential to figure out which ones mattered most.

Several of the top-priority chemicals had no established safety limits for children, meaning regulators haven't set rules for them yet. Others exceeded risk thresholds when the researchers modeled a child's typical daily exposure from playing on the mat in a bedroom or playroom.

New mats gave off the most chemicals. Airing out a new play mat in a well-ventilated area for several days before use can reduce some of the off-gassing. Look for mats certified by third-party labs like OEKO-TEX or Greenguard, which test for VOC emissions.