Does Your Mattress Contain These Toxic Materials?

That “new mattress smell” might seem harmless. Comforting, even. But it could be a sign that your mattress is releasing a mix of volatile chemicals into the air you breathe all night long. We’re talking about ingredients you’ll never see on a label, from flame retardants and phthalates to VOCs and formaldehyde. These compounds can linger in your bedroom air for months or even years, quietly affecting your health as you sleep.

And here’s the catch: most people have no idea they’re even there.

The truth is, conventional mattresses are often made with industrial materials designed for cost-efficiency and compliance, not human health. And while these materials may pass safety regulations, that doesn’t mean they’re safe for long-term exposure, especially in the one place that should support deep rest and recovery.

In this blog, we’ll spotlight the top toxic chemicals commonly found in mainstream mattresses, explore how they can affect your health and share what to look for if you want a mattress that’s comfortable – and comforting too.

In the 1970s, U.S. fire safety regulations began requiring household items – including mattresses – to meet strict flammability standards. The intention was good: reduce the risk of fires caused by cigarettes and open flames. But rather than rethinking mattress design, many manufacturers turned to chemical flame retardants as a quick fix.

Unfortunately, these chemicals came with a steep tradeoff. Substances like polybrominated diphenyl ethers (PBDEs) were commonly used for years before research linked them to hormone disruption, neurodevelopmental issues, reproductive harm and even cancer. Although PBDEs have since been phased out, they’ve often been replaced by other chemical flame retardants that carry similar concerns like organophosphates and chlorinated flame retardants.

And it’s not just chemicals you need to watch out for. In recent years, some lower-cost mattresses have started using fiberglass as a flame barrier. It’s often woven into an inner sock-like layer beneath the outer cover. While fiberglass is technically effective at preventing fire spread, it can be a nightmare if the mattress cover is ever removed or damaged, releasing tiny glass fibers into your home’s air and surfaces. These fibers can irritate the skin, eyes and respiratory system, and they’re incredibly difficult to clean up.

That chemical “new mattress smell” we mentioned? It’s likely caused by VOCs – volatile organic compounds that off-gas from synthetic materials. VOCs are gases emitted from certain solids or liquids, including adhesives, foams and chemical finishes commonly found in paint, carpeting and, you guessed it, conventional mattresses.

It’s important to note that not all VOCs are harmful. Some occur naturally and are relatively harmless in low concentrations. However, mattresses can emit a mix of VOCs, and some of the most concerning include formaldehyde, benzene, toluene and acetaldehyde. These chemicals are linked to short- and long-term health risks that range from respiratory irritation, headaches and dizziness to organ damage and cancer.

Because we spend such a large portion of our lives sleeping – and often in closed, poorly ventilated rooms – chronic exposure to even low levels of harmful VOCs can become a serious concern. Babies and young children are particularly vulnerable to off-gassing due to their size and faster breathing rates.

Some of the most harmful VOCs in mattresses come from one particular source: formaldehyde. Formaldehyde is a colorless, strong-smelling gas that’s often used in glues, adhesives and chemical finishes, especially in the production of foam, textiles and composite wood products. In mattresses, it can show up in adhesives that bind layers together or in wrinkle-resistant fabric finishes. Even coil systems aren’t exempt – encased coils are often individually wrapped in fabric and held together with adhesives that may contain formaldehyde or other VOC-emitting compounds.

The concern? Formaldehyde is classified as a known human carcinogen by the U.S. Environmental Protection Agency (EPA) and the International Agency for Research on Cancer (IARC). Long-term exposure has been linked to respiratory issues, skin irritation and increased cancer risk, particularly for the nose and throat.

While some mattress manufacturers claim to use only trace levels or “low-emitting” adhesives, formaldehyde can still off-gas over time, especially in warm, enclosed environments like bedrooms. And since there’s no requirement to disclose its presence, most consumers have no idea it’s there.

Polyurethane foam is one of the most common materials used in conventional mattresses, and one of the biggest contributors to chemical exposure in the bedroom. Made from petroleum-based chemicals, this synthetic foam is inexpensive, versatile and easy to produce, which is why it's often used as the base layer or comfort layer in mattresses.

But the low price comes at a high cost. Polyurethane foam is a source of VOCs including toluene, methylene chloride and other chemical byproducts released during off-gassing. It’s also highly flammable, which is why it’s often paired with chemical flame retardants to meet safety regulations, compounding the risk.

Some variations, like memory foam (also known as viscoelastic polyurethane foam), can contain even more chemical additives to alter density, texture or temperature response. These additives aren’t always disclosed, and many memory foam mattresses emit strong chemical odors for days – or even weeks – after unboxing.

Phthalates (pronounced THAL-ates) are a group of chemicals commonly used to make plastics flexible and durable. In mattresses, they’re most often found in waterproof covers, vinyl layers and certain synthetic fabrics, particularly in crib and children’s mattresses, where waterproofing is a must-have feature.

The problem? Phthalates are known endocrine disruptors. That means they can interfere with the body’s hormone systems, potentially leading to health issues developmental delays, reproductive issues, reduced fertility and even behavioral problems in children. Young children are especially vulnerable depending on their size, developmental stage and the amount of time spent sleeping.

While some types of phthalates have been banned in children’s products in the U.S., these bans don’t always apply to all mattress components or to adult mattresses. And unless a company is transparent about their materials, it’s hard to know whether phthalates are lurking in layers you can’t see.

Mattresses shouldn’t come with a hidden list of chemicals, but too often, they do. And because most of these chemicals are tucked away beneath layers of foam or fabric, you’d never know they were there unless you asked. That’s why transparency matters. And so does knowing what to look for.

Today, more mattress brands are using buzzwords like “clean,” “natural” or “eco-friendly” without offering real proof. This is nothing more that greenwashing, marketing meant to make products sound safer than they really are. If a brand doesn’t clearly disclose its materials or offer independent certifications, it’s worth questioning what they might be trying to hide.

What to do instead? Look for certifications you can trust, like:

• GOTS
• EWG Verified
• GOLS
• MADE SAFE
• GREENGUARD Gold
• UL Formaldehyde Free

Don't lose sleep over what you're sleeping on. Choose a third-party certified mattress and kick toxins out of your bedroom.