50+ Mattress Off-Gassing Statistics for 2026 (VOC Data)

Mattress off-gassing is the release of volatile organic compounds (VOCs) from a new mattress, mostly from synthetic polyurethane foam, adhesives, and flame retardants. Almost every guide describes the smell. Almost none of them put a number on it.

This page does. Below are 52 sourced statistics on how much a mattress actually emits, which chemicals come out, how long it lasts, who is most exposed, and what the certification labels really mean. The data comes from peer-reviewed studies, the U.S. EPA, NIST, and the certification bodies themselves. At Fawcett Mattress, Canada's natural mattress company, we build every mattress from 100% natural Talalay latex, organic cotton, and organic wool, so the petroleum-based foams behind these numbers never go in.

Key Takeaways

• New mattresses emit VOCs at about 87.1 µg/m²·h, roughly four times the rate of a used mattress and higher than laminate flooring or wall covering.
• Body heat is the single biggest driver. Warming a mattress from 23°C to 36°C raised total VOC emissions about 2.5 times, from 56 to 139 µg/m²·h.
• Off-gassing peaks in the first 24 to 72 hours after unwrapping and decays over roughly a month, though some compounds have half-lives near 24 days.
• More than 30 VOCs have been measured in mattresses, alongside plasticizers found in 17 of 20 crib covers, flame retardants, and unreacted isocyanates.
• Certifications set hard limits. GREENGUARD Gold caps total VOCs at 220 µg/m³ and formaldehyde at 9 µg/m³; CertiPUR-US requires formaldehyde below 0.1 ppm.

Mattress Off-Gassing Statistics (2026)

How Much VOC a Mattress Emits

The measured emission rates below are the numbers most off-gassing guides leave out.

Measured VOC emission rates for common bedroom materials. The new mattress was the strongest single source. Source: University of Texas at Austin.

1. New mattresses emit VOCs at 87.1 µg/m²·h on average. University of Texas at Austin engineers measured this rate across new crib mattresses in a chamber study.
2. Used mattresses emit far less, about 22.1 µg/m²·h. In the same University of Texas study, older mattresses released VOCs at roughly a quarter of the new-mattress rate after years of airing out.
3. A new mattress off-gasses about four times faster than an old one. The gap between the 87.1 and 22.1 µg/m²·h rates shows most emissions leave in the early life of the product.
4. Mattresses out-emit laminate flooring. The University of Texas team put laminate flooring at 20 to 35 µg/m²·h, below the new-mattress rate.
5. Mattresses also out-emit wall covering, measured at 51 µg/m²·h. Among common bedroom materials, the mattress was the strongest single VOC source in the study.
6. More than 30 individual VOCs were identified across the mattresses tested by the University of Texas researchers.
7. The sample covered 20 mattresses from 10 manufacturers, so the emission rates reflect the market, not a single bad product.
8. A polyurethane-foam mattress study quantified 18 VOCs, with emission fluxes ranging from 10⁻⁴ to 10⁻¹ mg/(h·m²), according to research in Environmental Science & Technology.
9. Polyurethane foam releases a wider mix of VOCs than polyester foam, based on chamber testing published in Environmental Science & Technology.

Body Heat More Than Doubles Off-Gassing

Your own body warmth, not the room, controls how much a mattress off-gasses. No mainstream guide covers this.

Warming a mattress from room temperature to near skin temperature raised total VOC emissions about 2.5 times. Source: Environmental Science and Technology.

10. Total VOC emissions rose from 56 µg/m²·h at 23°C to 139 µg/m²·h at 36°C, near skin temperature, in the Environmental Science & Technology chamber study. That is about a 2.5-times jump.
11. Heat is the main driver of emissions under sleeping conditions. The Environmental Science & Technology polyurethane study concluded that "elevated heat seems to be the major contributor" to higher VOC release.
12. Body weight and warmth together raise emissions several times over. A 2025 Canadian study reported by EurekAlert found that simulating a child's body temperature and weight increased mattress chemical emissions substantially.

The Chemicals in Mattress Off-Gassing

Off-gassing is not one chemical. Peer-reviewed testing has found plasticizers, flame retardants, and reactive compounds in mattress foam and covers.

Plasticizers turned up in almost every crib-mattress cover tested. Source: Environmental Science and Technology Letters.

13. 17 of 20 crib-mattress covers contained at least one plasticizer, according to Environmental Science & Technology Letters.
14. Plasticizer content in those covers ranged from 1% to more than 35% by weight, per the Environmental Science & Technology Letters analysis.
15. Inside the polyurethane foam, plasticizer concentrations typically ran 0.1 to 10 mg/g, according to the Environmental Science & Technology Letters study.
16. Flame retardants were identified in the foam, including pentaBDE congeners and triphenyl phosphate, per the Environmental Science & Technology Letters analysis.
17. Unreacted isocyanates were identified in polyurethane crib-mattress foam. These are reactive compounds left over from foam manufacturing, per the Environmental Science & Technology Letters study.
18. Formaldehyde is classified as a known human carcinogen by both the International Agency for Research on Cancer and the National Toxicology Program, reports the National Cancer Institute.
19. Formaldehyde effects can appear above 0.1 ppm, a level some people react to with eye, nose, and throat irritation, according to the National Cancer Institute.
20. Normal indoor formaldehyde usually sits below 0.03 ppm, well under that effect threshold, per the National Cancer Institute.
21. Benzene, toluene, and styrene are among the individual VOCs capped by the GREENGUARD certification criteria, on top of formaldehyde and a total-VOC limit.

How Long Mattress Off-Gassing Lasts

The honest answer is a curve, not "a few days." Emissions spike early and taper for weeks.

A fading smell does not mean the emissions have stopped. Source: peer-reviewed memory-foam chamber study.

22. Off-gassing peaks in the first 24 to 72 hours after a mattress is unpackaged, based on a peer-reviewed chamber study.
23. Airborne VOCs peaked on day one and decayed over the following 31 days in that memory-foam chamber study.
24. Short-term VOCs have half-lives of about 4 to 12 hours. These are the compounds behind the strong initial smell, per the same study.
25. Some VOCs have long half-lives near 24 days, meaning low-level emissions continue well after the odor fades, according to the same study.
26. Modeled 32-day average total VOC concentrations were about 20 and 33 µg/m³ for the two mattresses tested in that study.
27. One-year average concentrations dropped to 2.7 and 4.2 µg/m³, showing how far emissions fall once a mattress has aged, per the same study.

Children Face the Highest Off-Gassing Exposure

Infants and young children get the largest relative dose. They sleep more, breathe faster, and lie in direct contact with the mattress.

Three reasons the same mattress is a bigger exposure for a child than an adult. Sources: Forbes, 2025 Canadian bedroom study.

28. Infants sleep 50% to 60% of the day, in close contact with the mattress surface, notes the University of Texas at Austin.
29. Young children can spend up to 18 hours a day in bed, according to Forbes.
30. VOC levels in an infant's breathing zone run 1.8 to 2.4 times higher than bulk room air, per the Environmental Science & Technology chamber study.
31. Inside the mattress, pore-air VOCs measured 7.5 to 21 times room-air levels in the same study, showing how concentrated the source is.
32. Children breathe about 10 times more air per unit body weight than adults, according to a 2025 Canadian study of children's bedrooms reported by EurekAlert.
33. A child's skin surface area relative to body weight is about three times an adult's, raising contact exposure, reports Forbes.
34. A 2025 Canadian study measured chemicals in 25 bedrooms of children aged 6 months to 4 years, finding the highest levels near the beds.
35. A companion Canadian study tested 16 newly purchased children's mattresses as the likely main source of those chemicals.

Health Effects and Indoor Air Quality

VOCs are an indoor-air problem, not just a smell. Bedrooms concentrate them because the source sits in the room for years.

36. Indoor VOC levels run up to 10 times higher than outdoors, according to the U.S. Environmental Protection Agency.
37. A dozen common organic pollutants measured 2 to 5 times higher inside homes than outside in the EPA's TEAM study.
38. VOC levels can spike to 1,000 times background outdoor levels during and after activities that release them, per the EPA.
39. Reported VOC health effects include eye, nose, and throat irritation, headaches, nausea, and organ damage, and some VOCs are known to cause cancer, according to the EPA.
40. New-mattress reactions in the field can be severe for sensitive people. One user account documented by Tom's Guide described wheezing, headaches, and an asthma attack in a guest, though such reactions are not typical.

Why Mattresses Contain Flame Retardants

The chemicals are not accidental. Federal fire-safety law requires every mattress to resist an open flame, and conventional foam meets it with added flame retardants.

41. The federal open-flame mattress standard, 16 CFR 1633, took effect July 1, 2007, according to NIST.
42. Bed fires caused an estimated 95 deaths a year from 2002 to 2005, before the standard, per NIST.
43. The standard prevented an estimated 65 bed-fire deaths a year in 2015 and 2016, according to NIST.
44. Bed-fire deaths fell 82% and injuries fell 34% after the standard took effect, per NIST.
45. The rule caps a mattress's peak heat-release rate at under 200 kW, which conventional mattresses often meet using chemical flame retardants, according to NIST.
46. Mattresses stay in the home 10 to 12 years on average, so any added chemicals share the bedroom for a decade, notes NIST.

Mattress Certification VOC Limits

Certifications turn "low-VOC" into actual numbers. These thresholds are the ones worth checking a label against.

47. GREENGUARD Gold caps total VOCs at 220 µg/m³, tighter than the standard GREENGUARD limit of 500 µg/m³, per the GREENGUARD certification criteria.
48. GREENGUARD Gold limits formaldehyde to 9 µg/m³ (7.3 ppb), well under the 50 ppb standard limit, according to UL.
49. GREENGUARD Gold also caps individual VOCs, including benzene, toluene, and styrene, and screens products for more than 360 compounds, per the GREENGUARD program.
50. CertiPUR-US requires certified foam to emit less than 0.1 ppm formaldehyde and less than 0.5 ppm total VOCs, and to be made without prohibited phthalates, mercury, lead, or other heavy metals, according to CertiPUR-US.
51. A "natural" label on a mattress is not tied to any official certification, reports Consumer Reports, which is why the specific certification matters more than the word.
52. In a nationally representative Consumer Reports survey, 12% ranked a "no harmful materials" label among their top three mattress features, showing how few buyers prioritize chemical safety.

Off-Gassing by Mattress Type

Not every mattress off-gasses the same way. The amount depends almost entirely on how much synthetic foam is inside.

Memory foam and polyfoam drive the highest emissions because they are petroleum-based polyurethane, the exact material the peer-reviewed studies measured. Natural latex sits at the bottom because it is made from the sap of the Hevea brasiliensis rubber tree, not from polyurethane, so it does not off-gas the same synthetic VOCs.

How to Reduce Mattress Off-Gassing

You can speed up off-gassing by giving the early spike somewhere to go. Because emissions peak in the first days and rise with heat, airflow and time do most of the work.

1. Unwrap the mattress right away in a well-ventilated room. The plastic wrap traps fumes, so opening it starts the decay clock.
2. Air it out for at least 2 to 3 days before sleeping on it if you can. This covers the 24-to-72-hour peak.
3. Maximize airflow. Open windows and run an oscillating fan across the surface to carry VOCs out.
4. Apply baking soda, let it sit, then vacuum to help absorb surface odor.
5. Choose certified low-VOC or natural materials to limit how much off-gasses in the first place.

The one lever buyers fully control is what the mattress is made of. A certified low-VOC or natural mattress starts with a much smaller chemical load, so there is less to air out.

Natural Materials and Off-Gassing

The VOCs measured in every study above come from petroleum-based foam and synthetic flame retardants. A mattress built without those materials does not have the same source to off-gas.

Natural Talalay latex is made from rubber-tree sap, not polyurethane, so it avoids the synthetic VOCs behind these numbers. Organic cotton and wool replace synthetic covers, and wool acts as a natural fire barrier that removes the need for chemical fire retardants in mattresses. At Fawcett Mattress, we build with 100% natural Talalay latex certified Cradle to Cradle GOLD, plus OEKO-TEX certified organic cotton and wool, so there are no synthetic foams to release the compounds in this report. Each of these material certifications is held per material, not claimed for the mattress as a whole.

Frequently Asked Questions

How long does mattress off-gassing last?

Mattress off-gassing peaks in the first 24 to 72 hours and largely fades over about a month. The strongest smell comes from short-lived VOCs with half-lives of 4 to 12 hours, while lower-level emissions can continue for weeks as longer-lived compounds decay.

Is mattress off-gassing toxic or harmful?

For most healthy adults, temporary off-gassing is tolerable, but concentrated exposure and sensitive groups are the real concern. VOCs like formaldehyde are classified as human carcinogens, and high indoor levels can trigger headaches, nausea, and respiratory irritation, especially for infants, people with asthma, and those with chemical sensitivities.

What does mattress off-gassing smell like?

Off-gassing smells like a chemical or plastic "new mattress" odor, strongest right after unwrapping. Keep in mind that some VOCs are odorless, so a fading smell does not always mean emissions have stopped.

Is mattress off-gassing safe during pregnancy?

Pregnancy is a good reason to be cautious, since it counts as a sensitive-exposure period. Air out a new mattress well before use, maximize ventilation, and favor certified low-VOC or natural materials to reduce chemical exposure.

Which mattress has the least off-gassing?

Natural latex mattresses and certified low-VOC mattresses off-gas the least, because they contain little or no petroleum-based polyurethane foam. Innerspring beds fall in the low-to-moderate range, while memory foam and polyfoam off-gas the most.

The Bottom Line

Mattress off-gassing is real, measurable, and driven almost entirely by synthetic foam. New mattresses emit VOCs at about 87.1 µg/m²·h, warming a mattress toward body temperature raised emissions about 2.5 times in testing, emissions peak in the first 24 to 72 hours, and children absorb the largest relative dose. Those are numbers you can act on, not just a smell to wait out.

The one thing a buyer controls is the material. Foam-free, certified, and natural-fiber mattresses start with a smaller chemical load, so there is less to air out and less left behind. That is the approach we take at Fawcett Mattress, building every mattress from natural Talalay latex and organic fibers instead of the synthetic foams these studies measured. A natural latex mattress made from rubber-tree sap avoids the polyurethane VOCs behind this entire report, which is why materials, not air fresheners, are the real fix. To see how a foam-free build works, explore our natural latex mattresses.

Sources

1. University of Texas at Austin, Cockrell School of Engineering
2. Environmental Science & Technology: Infant Exposure to Emissions of VOCs from Crib Mattresses
3. Environmental Science & Technology: VOC Emissions from Polyurethane Mattresses under Variable Environmental Conditions
4. PubMed: VOC Emissions from Memory Foam Mattresses and Consumer Health Risk
5. Environmental Science & Technology Letters: Plasticizers, Flame Retardants, and Isocyanates in Crib Mattresses
6. EurekAlert: Children Exposed to Brain-Harming Chemicals While Sleeping
7. Forbes: How Children Are Exposed to Brain-Harming Chemicals While Sleeping
8. U.S. Environmental Protection Agency: VOCs' Impact on Indoor Air Quality
9. National Cancer Institute: Formaldehyde and Cancer Risk
10. UL GREENGUARD Certification Criteria
11. CertiPUR-US: About the Certification
12. NIST: Mattress Flammability Standard Is a Lifesaver
13. Consumer Reports: VOCs and Other Toxic Chemicals in Mattresses
14. Tom's Guide: What Is Mattress Off-Gassing?

The Author: Duane Franklin