That “new mattress smell”? It’s not as harmless as it seems.

You know, that distinct smell that hits you when you unbox a new mattress? It might remind you of a freshly detailed car or a brand-new couch. But while it may seem like a sign of “newness,” it’s actually a warning sign.

That odor comes from off-gassing, aka, the release of volatile organic compounds (VOCs) from synthetic materials inside the mattress. These chemicals don’t just smell strange. They can negatively impact your health and your indoor air quality, and, worse, not all VOCs have a scent, so you may not even realize your mattress is releasing them.

If you’re sleeping on a conventional mattress, there’s a good chance it’s off-gassing the bad VOCs. Here’s what you need to know, and how to avoid toxic VOCs in your sleep environment for good.

Off-gassing is the release of chemicals from manufactured materials into the air you breathe. It happens when products made with synthetic materials like memory foam, adhesives or certain plastics like PVC break down over time, releasing VOCs.

Mattresses are a major source of off-gassing in the home, especially those made with petroleum-based foams and harsh chemical treatments. And while that “new mattress smell” might be the most obvious sign, off-gassing doesn’t always come with a scent. That means you could be breathing in harmful VOCs night after night without even realizing it.

VOCs (volatile organic compounds) are chemicals that easily become vapors or gases at room temperature. They’re commonly used in manufacturing to create things like foams, adhesives. finishes and synthetic fabrics. And? They’re found in pretty much everything from household cleaners to furniture to mattresses.

Not all VOCs are toxic, but many VOCs are linked to health risks ranging from short-term symptoms like headaches or nausea to long-term effects like respiratory issues and even organ damage. Some VOCs are also classified as carcinogens.

Because they’re airborne, VOCs affect your indoor air quality, and because you spend about a third of your life in bed, your mattress can be a major source of exposure.

Most conventional mattresses are made with synthetic and petroleum-based materials that are known to off-gas VOCs. These include:

• Memory foam and polyurethane foam – made from petroleum-derived chemicals
• Chemical flame retardants – added to meet flammability standards
• Cooling gels and proprietary foam blends – often synthetic and unregulated
• Industrial adhesives – used to bind mattress layers together

Even mattresses that claim to be “natural” or “green” may still include materials that release VOCs, especially if they’re not certified organic. Because these chemicals break down over time, off-gassing can continue for weeks, months or even years after you bring a mattress home. And, again, because some VOCs are odorless, you may not realize your mattress is emitting anything at all.

The answer ranges from not-so harmful to very harmful – for you and the planet. Breathing in VOCs from your mattress can trigger a range of short-term symptoms, including:

• Headaches
• Nausea or dizziness
• Eye, nose and throat irritation
• Worsened asthma or allergy symptoms

And the long term risks? Even more concerning. 

Prolonged exposure to certain VOCs has been linked to:

• Liver and kidney damage
• Nervous system issues
• Hormone disruption
• Cancer

It's not just a personal health issue, either. Once released into the air, VOCs can react with sunlight and other pollutants to form ground-level ozone and smog. Some VOCs also contribute to acid rain and act as greenhouse gases, harming ecosystems and accelerating climate change. When you consider all that, it’s clear that a mattress that off-gasses VOCs isn’t just unpleasant. It’s unsafe.

Mattresses aren’t the only household items releasing VOCs into your air. Thanks to widespread use of synthetic materials and chemical additives, off-gassing is a problem throughout many modern homes. 

Common sources of VOCs include:

• Paints and finishes
• Carpet and vinyl flooring
• Upholstered furniture
• Air fresheners and scented candles
• Cleaning supplies and disinfectants
• Plastics and synthetic textiles

Individually, each item may seem insignificant, but together, they can seriously degrade your indoor air quality, especially in closed, poorly ventilated spaces like bedrooms. That’s why it’s important to be mindful of the materials and certifications behind the products you bring into your home, especially the ones you use every day or sleep on every night.

The best way to avoid VOCs in your mattress? Skip the marketing fluff and look for real certifications. Third-party testing offers the clearest picture of what’s in (and what’s not in) your mattress, especially when it comes to chemical emissions.

This certification is one of the most trusted indicators of low-VOC products. GREENGUARD® Gold tests for more than 360 VOCs and sets strict limits to ensure products contribute to healthier indoor air, which is essential for bedrooms, nurseries and anyone with sensitivities or respiratory concerns. If a mattress is GREENGUARD Gold Certified, you can rest easier knowing it meets some of the world’s most rigorous standards for chemical emissions.

While GREENGUARD Gold focuses specifically on low emissions, it’s not the only certification worth paying attention to. These additional third-party labels help ensure your mattress is made without harmful chemicals and synthetic materials that contribute to VOC exposure:

• GOTS (Global Organic Textile Standard): Bans harmful VOC sources like flame retardants and formaldehyde and requires certified organic fibers.
• MADE SAFE®: Screens for 15,000+ known and suspected toxic chemicals and only certifies products that pass a strict non-toxic ingredient review.
• GOLS (Global Organic Latex Standard): Applies to certified organic latex made without harmful synthetic additives and off-gassing agents.
• EWG Verified®: Recognized for ingredient safety, this label is growing in the mattress and bedding space.
• UL Formaldehyde Free: Verifies that a product contains no added formaldehyde, a common VOC and known irritant.

When shopping for a mattress, these certifications go beyond greenwashing and provide real peace of mind.

Technically, everything off-gasses – even natural materials. But not everything releases harmful VOCs into the air you breathe. At Happsy, we do everything in our power to make sure that your mattress doesn’t. 

We craft every Happsy mattress with certified organic materials and no polyurethane foam, flame retardants or toxic glues, so you don’t have to worry about the kinds of VOCs linked to health and environmental harm. We also back our materials with trusted third-party certifications like GOTS, EWG Verified, MADE SAFE, UL/GREENGUARD and GOLS to ensure low emissions, ingredient transparency and true non-toxic peace of mind.

You spend a third of your life in bed, and your mattress should support that time, not pollute it. With Happsy, you can rest easier knowing your sleep is cleaner, safer and certified.