How to Choose a Non-Toxic Mattress: What the Certifications Mean

Adults spend approximately one-third of their lives in bed, in sustained contact with mattress materials for 7 to 9 hours every night. Most conventional mattresses consist of polyurethane foam derived from petroleum, covered in synthetic fabric, treated with chemical flame retardants to meet fire safety standards, and finished with processes that involve formaldehyde. The mattress is one of the longest-duration chemical exposures in the home.

What is in a conventional mattress

The core of most mainstream mattresses is polyurethane foam, a petroleum-derived polymer. Memory foam is a higher-density variant of polyurethane foam. Both emit volatile organic compounds (VOCs), particularly in the first weeks after purchase. The fabric ticking and quilting layers often contain synthetic fibres treated with antimicrobial compounds and wrinkle-resistant finishes that include formaldehyde-releasing agents. The foam itself may contain catalysts, surfactants and blowing agents from the manufacturing process, some of which have not been fully characterised for safety.

Flame retardant regulations

US federal standard 16 CFR 1633, introduced in 2007, requires that mattresses resist an open flame for 30 seconds without igniting. Meeting this standard with polyurethane foam typically requires chemical flame retardants. Before 2004, polybrominated diphenyl ethers (PBDEs) were widely used. PBDEs were subsequently banned after evidence of their toxicity and endocrine disruption. They were replaced with chlorinated organophosphate flame retardants (chlorinated Tris, TDCPP) and antimony trioxide. TDCPP is listed as a probable human carcinogen in California. Natural materials including wool are naturally flame-resistant and can meet 1633 standards without synthetic chemicals.

Off-gassing and VOCs

New mattresses off-gas VOCs including toluene, benzene, formaldehyde and acetaldehyde. The smell associated with a new mattress is the odour of these compounds leaving the foam. Studies measuring VOC concentrations in bedrooms with new conventional mattresses found levels that exceed indoor air quality guidelines during the first weeks of use. Ventilating a new mattress outdoors for 72 hours before use reduces but does not eliminate VOC exposure. The only way to avoid this exposure category is to choose a mattress made from materials that do not off-gas.

Certifications that matter

GOLS (Global Organic Latex Standard) certifies that latex comes from organically farmed rubber trees and covers the entire supply chain. GOTS (Global Organic Textile Standard) certifies organic cotton and wool fabric layers. GREENGUARD Gold certifies that the mattress meets strict chemical emission limits, covering VOC off-gassing. CertiPUR-US covers foam only and excludes some harmful flame retardants, but does not address all chemical concerns and does not cover fabric layers. The certifications that matter most are GOLS for latex cores, GOTS for fabric layers, and GREENGUARD Gold for overall chemical emissions.

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