50 Fiberglass in Mattress Statistics in 2026 (US and Canada Data)

6. Wool and other animal fibres rose from 0.1% to 0.6% to 5.4% of US mattress interior fire barriers across the January 2020, January 2023 and January 2026 filings. That is a 54-fold increase in the share of US mattress fire barriers using an animal fibre.

7. Silica-embedded rayon now holds 83.4% of US mattress interior fire barriers, up from 67.6% in the January 2020 filing. It dipped to 58.1% in the January 2023 filing before taking the largest share of the category.

8. Modacrylic treated with antimony trioxide fell from 13.6% of US mattress interior fire barriers in January 2020 to 6.0% in January 2023, then below the reporting threshold in January 2026. Two of the four leading fire-barrier fibres from 2020 are now reported by fewer than four producers each.

Share of US mattress interior fire barriers, by producer survey filing. Figures are for units assembled by responding US producers.

9. One mattress review site's tally of its own product catalogue put fiberglass prevalence at 7.8%. NapLab reports that 32 of the 410 models it has catalogued contain fiberglass, 367 do not, and 11 are unclear. That number is the one the search results and AI summaries quote most often, and it is a count of reviewed products with no stated sampling frame, not a measure of the market.

Two caveats belong with these figures. The association changed its withholding threshold from three respondents to four between the first and second filings, so the 2020 to 2023 comparison carries a small methodology change. And the January 2026 document repeats the survey-period wording from its predecessor, so the safe attribution is to the filing date rather than to a survey quarter.

What Lab Testing Found Inside Mattresses

Two independent government-linked testing efforts have measured what is actually inside mattress covers. Both found fiberglass present in the barrier layer and largely contained, with small amounts migrating into neighbouring fabric.

10. Fiberglass was found in two of four new mattresses tested by California's health department. Researchers bought a Sealy, a Modway, a Zinus and a Graco crib mattress from common online outlets and analysed the covers, publishing the results in a peer-reviewed study of flame-resistant fibres in mattress covers.

11. The inner sock layers of the two mattresses that contained fiberglass ran 50% and 75% fiberglass by mass. The sock is a sealed sleeve of fabric sitting under the outer cover, not a loose layer.

12. Up to 1% of the fiberglass in the two affected covers had migrated out of the inner sock into adjacent fabric layers. The authors describe that as a potential exposure risk specifically if the zipper on the outer cover is opened.

13. No fiberglass reached the sleeping surface of any of the four mattresses tested. The top cover, the layer a sheet and a sleeper touch, was clear on all four samples as purchased.

What California's health department found in four new mattresses: the inner socks ran 50% to 75% fiberglass by mass, almost none of it moved out, and none reached a sleeping surface. Source: peer-reviewed study of flame-resistant fibres in mattress covers.

14. Five trace fiberglass fibres were recovered from the bottom outer cover of one of the four mattresses tested. That was the full extent of what reached an outer surface across the four samples, and it was the underside rather than the sleeping side.

15. The fiberglass fragments recovered in that California health department study had calculated aerodynamic diameters of 30 to 50 microns. At that size they are inhalable into the nose, mouth and throat, and the authors judge them likely too large to reach the deep lung.

16. In that California health department study, the individual fiberglass fibres measured 5 to 10 microns thick. Thickness governs whether a fibre irritates skin on contact; aerodynamic diameter governs where it lands if inhaled.

17. The US Consumer Product Safety Commission's own laboratory measured an average fibre length of 11.3 mm. The agency's analysis of ticking and barrier fabrics in mattresses was released under a freedom of information request.

18. Fibre diameters in that same US product safety laboratory analysis ran roughly 2 to 3.5 microns, averaged from 20 individual measurements per sample. One sample's fibres were too brittle to separate for a length measurement.

19. The US Consumer Product Safety Commission found no evidence of fiberglass breaking or moving through the ticking fabric on either mattress sample it analysed. Ticking is the outermost woven layer, the part a sheet touches.

20. A search of the US Consumer Product Safety Commission's complaint database returned 128 complaints tied to mattress fiberglass exposure across calendar year 2020. The complaints named several different brands.

The honest version of this picture has two halves. Controlled testing on new mattresses found the fiberglass contained, with nothing on the sleeping surfaces and no fibres passing through the ticking. The complaint record points the other way: 128 fiberglass complaints were filed in a single year, and the product safety commission's own test plan states that reported exposure incidents attributed to mattresses "have increased dramatically over the last 4 years." The tested mattresses were new and unopened. The complaints involve mattresses already in use, which is a different condition and one no published study has measured. Both halves are real, and the gap between them is the part nobody has data on.

Fiberglass Complaints and Mattress Recalls

No mattress in either country's public recall database has ever been recalled for fiberglass. That holds across every mattress recall the US Consumer Product Safety Commission and Health Canada have published.

21. Zero of 75 US mattress recalls mention fiberglass or glass fiber. A search of the commission's public recall database for mattress products returns 75 records, none of which names fiberglass as the hazard.

No mattress in the US recall database has ever been recalled for fiberglass, and 51 of the 75 recalls were flammability failures. Source: US Consumer Product Safety Commission recall database.

22. A second search of that same US recall database, by recall title rather than product name, returned 82 mattress records with zero fiberglass mentions. Searching by recall title rather than product name produces a wider set and the same result.

23. Zero mattress recalls in Health Canada's recalls and safety alerts database cite fiberglass. Canadian mattress recalls in the database cite flammability, entrapment or suffocation instead.

24. US mattress recalls rose to 8 in 2023, 10 in 2024 and 8 in 2025, against 1 to 3 per year from 2020 to 2022. Recall activity roughly tripled without a single fiberglass case among it.

25. Flammability failures account for 51 of the 75 mattress recalls in the US Consumer Product Safety Commission's database. Mattresses are being pulled from the market for failing fire tests, not for the material used to pass them.

Recalls from 2020 onward. The 75-record and 51-record figures above cover the full recall database, which reaches back well before 2020.

128 complaints in one year against zero recalls is not a contradiction. A recall requires a defect or a breach of a mandatory standard, and a mattress that holds its fiberglass inside a sealed cover and passes its flammability test breaches nothing, however unhappy the owner is when it leaks.

The Flammability Standard Behind Fiberglass

Fiberglass is in mattresses because it is one of several fibres that pass the US open-flame test, and it is common in budget models where manufacturers choose the lowest-cost fire barrier. The federal standard, 16 CFR Part 1633, sets two limits that any mattress sold in the US must clear.

26. Under the US open-flame mattress standard, total heat release may not exceed 15 megajoules in the first 10 minutes of the test. That cap is what stops a burning mattress from flashing a bedroom over before anyone can leave it.

27. Peak heat release rate may not exceed 200 kilowatts across the full 30-minute test under 16 CFR Part 1633. That cap and the 15 megajoule limit together define the standard a fire barrier exists to meet.

28. The US open-flame mattress standard took effect on 1 July 2007. Mattresses made before that date were built to a cigarette-ignition rule only.

29. All or virtually all US residential mattresses now comply using a fire barrier rather than treated foam. That is the industry's own description in its filings to California, and it is why the choice of barrier fibre matters so much.

30. Bed-fire deaths fell 82% measured against a control group of unregulated upholstered furniture fires. Researchers at the US National Institute of Standards and Technology used that benchmark to separate the open-flame standard's effect from the general decline in home fires, publishing the estimate of the standard's impact on bed fire outcomes.

31. Bed-fire injuries fell 34% when measured against that same control group of unregulated upholstered furniture fires, while the raw count of bed fires fell 12%. The benchmarked estimates and the raw counts answer different questions, so one cannot be derived from the other.

32. The US open-flame mattress standard prevents roughly 65 fatalities a year. That is the study's central estimate of annual lives saved.

33. Measured per bed fire, fatalities fell 67% and injuries fell 25%. These come from a separate per-fire model with no upholstered-furniture benchmark, which is why they do not reconcile arithmetically with the 82% figure. Fires that still happen are markedly less deadly than they were.

34. US home fires cause at least 2,500 deaths and 11,000 injuries a year. The National Capital Poison Center reports that upholstered furniture and mattresses are the two items most often implicated in home fire deaths.

35. More than 25% of all US fires occur in home environments. The US open-flame mattress standard exists because beds are where fatal fires start.

Fiberglass holds its place in that system by not burning. It will not combust or decompose when a mattress ignites, so it acts as scaffolding that keeps char-forming fibres in position while everything around them burns. The standard did what it was built to do. Glass was one way to satisfy it, and other fibres satisfy it too.

Fiberglass in Mattresses in Canada

Canada has no open-flame mattress standard. The federal Mattresses Regulations made under the Canada Consumer Product Safety Act require a cigarette-ignition test and nothing more, which means a mattress built only to Canadian requirements has no regulatory reason to carry a fiberglass fire sock at all.

36. Under Canada's Mattresses Regulations, charring must not extend more than 50 mm horizontally from where the test cigarette sat. That is the pass criterion under the Canadian test method for combustion resistance of mattresses.

37. Canada's mattress test also requires that combustion stop within 10 minutes of the cigarette going out. A smouldering mattress that self-extinguishes inside that window passes.

38. Canada's regulation permits failure in no more than one test specimen. The regulation allows a single failing specimen across the test set before the mattress fails outright.

39. Canada has zero federal open-flame mattress requirements. The entire regulatory driver behind fiberglass adoption in the US has no Canadian counterpart.

Canada's federal Mattresses Regulations require a cigarette-ignition test and nothing more, so a mattress containing fiberglass can still be sold legally here. Source: Mattresses Regulations, SOR/2016-183.

40. California will ban the sale of mattresses containing textile fiberglass from 1 January 2027. That ban, described in the California Department of Public Health factsheet on fiberglass and mattresses, also stops upholsterers repairing mattresses and juvenile products with the material.

Both halves of the Canadian picture matter. Canada does not require the test that pushed fiberglass into mattresses, and Canada has not banned fiberglass either. Nothing in the Mattresses Regulations addresses it, so a mattress containing fiberglass can be sold legally to Canadians, and imported product is not screened for it at the border. Canadian sources spell it "fibreglass," which is worth knowing if you are searching product listings or filing a complaint. If avoiding the material is the point, the material list matters more than the country of sale, which is the logic behind every non-toxic mattress in Canada worth considering.

Is Fiberglass in a Mattress Dangerous? What the Evidence Shows

Fiberglass is an irritant, and the cancer question has an answer that most pages on this topic skip. Stating it accurately matters more than stating it dramatically.

41. The International Agency for Research on Cancer classifies glass wool and continuous filament glass as Group 3, not classifiable as to carcinogenicity in humans. The agency reviewed the literature at least twice and reached that conclusion in 2001. Group 3 is not a clean bill of health, and it is a long way from asbestos, which sits in Group 1.

42. US occupational safety regulators state there is insufficient evidence that synthetic mineral fibres cause respiratory disease in humans. That position appears in OSHA's guidance on synthetic mineral fibre health effects.

43. Fiberglass is a known skin, eye and respiratory irritant and an asthmagen. In occupational settings, exposure has been linked to recurrent chest infections and pulmonary fibrosis. Those findings come from workplace exposure levels, not bedroom ones.

44. Contact with fiberglass irritates the eyes and skin, and inhaling fragments irritates the nose, throat and lungs. California's health department lists breathing problems among the effects of inhaling the fragments.

45. One documented case involved a six-year-old with persistent skin and respiratory irritation traced to suspected fiberglass leakage from a mattress bought in 2018. The 2021 investigation ended with the family disposing of the mattress, the carpet and clothing that could not be cleaned.

The loss in that case was not a hospital admission. It was a house that had to be stripped, down to the mattress, the carpet, and every item the fibres could not be cleaned out of. No survey has ever put a reliable dollar figure on that kind of cleanup, so we will not invent one. Families with young children can sidestep the question at the point of purchase, which is why material transparency matters most on a child's bed and on any organic crib mattress you are weighing.

Labels and Certifications That Miss Fiberglass

Checking the law label is the standard advice, and California's investigation showed it can fail. A missing mention of fiberglass on a tag is not proof the mattress is free of it.

46. Fiberglass was not listed at all on the label of one of the two mattresses California investigators found it in. On the other, it was disclosed, but not in the prominent flammability section of the law label where a buyer would look.

47. Both mattresses that California investigators found fiberglass in carried a CertiPUR-US label, which certifies the foam inside a mattress and not the cover. The certification most likely to reassure a buyer about fiberglass is the one that does not cover the layer holding it.

Both failures happened on mattresses a buyer could reasonably have believed were checked. One carried no disclosure at all, and the other buried it away from the flammability section, and both wore a certification badge that says nothing about the cover. Every certificate covers a defined scope, and reading that scope is what tells you whether it says anything about the layer you are worried about. Our own certifications page lists which standard applies to which material for that reason.

What the Industry Replaced Fiberglass With

Fiberglass is not the only way to pass a flammability test, and the industry's own filings name what took its place.

48. US mattress producers report nine distinct flame-resistant fibre groups used to meet the open-flame standard. Silica-embedded rayon, modacrylic, para-aramid and wool are among them, each with a different mechanism.

49. Wool is listed in the mattress industry's filings to California regulators as a thermal shield with no added flame-retardant chemical. In the association's own fibre table, the flame-retardant chemical column for wool reads not applicable, because the fibre resists ignition on its own.

50. Wool's share of US mattress interior fire barriers rose 54-fold while fiberglass fell out of the reported range. Going from 0.1% to 5.4% is a small base growing fast, and it is the clearest movement in the dataset.

Wool and other animal fibres as a share of US mattress interior fire barriers, by producer survey filing. Source: ISPA flame-resistant fibre survey filed with California regulators.

Wool is the material we build with. Every Fawcett mattress uses organic Joma Wool, stitched with organic cotton, as its fire barrier, which is why there is no fiberglass sock inside one and no chemical fire retardants either. That is a materials decision rather than a test result, and you can read what goes into each layer and check it against the certifications yourself. Our guide to fire retardants in mattresses covers how the wool layer does the job.

How to Tell If Your Mattress Has Fiberglass

Five checks give you a real answer, in descending order of reliability. The check most people reach for first, opening the cover to look, is the one that causes the damage.

1. Ask the manufacturer directly and get the answer in writing. This is the only check that produces a definitive answer. A company that will not name the material in its fire barrier has told you something.
2. Read the law label for fibre wording. Look for "glass fiber," "glass wool," "fibreglass" or "continuous filament fiber" in the materials list. A mention is proof it is there. Silence is not proof it is absent, because one of the two mattresses in California's investigation carried no disclosure at all.
3. Look for a "do not remove" instruction on a zippered cover. A removable cover paired with a warning against removing it signals that something inside is meant to stay inside.
4. Weigh the build and the price band. The mattresses California's investigators tested were low-cost twin and crib models bought from common online outlets. Budget foam models are where the material turns up in the testing that exists.
5. Use a flashlight at night if you suspect a leak. California's health department notes that glass fibres shimmer and sparkle under a raking light, which is how people find spots they missed while cleaning.

Never unzip a cover to check. Opening the zipper is the single action that turns a contained material into a contaminated bedroom, and it is what the health guidance tells you to avoid.

What to Do If Fiberglass Has Leaked

Stop sleeping on the mattress, keep the room closed off, and do not sweep. California's health department publishes the cleanup protocol, and the sequence matters more than the effort.

1. Wear goggles, a mask and clothing that covers your skin before entering the room.
2. Vacuum with a HEPA filter. Do not sweep, because sweeping pushes fibres into the air rather than removing them.
3. Wipe hard surfaces with a damp cloth and dispose of the cloth.
4. Launder affected fabrics separately, and run the empty machine on a rinse cycle between loads.
5. Shine a flashlight across the room at night to find fibres you missed, then repeat the vacuum and wipe on those areas.
6. Discard the mattress if the cover has a tear that cannot be repaired.

Items that cannot be cleaned get thrown out. In the case California investigated, that meant the mattress, the carpet and clothing.

Frequently Asked Questions

What percentage of mattresses contain fiberglass?

Fiberglass was in the interior fire barrier of 13.1% of US mattress units in the mattress industry's January 2020 filing to California regulators, 8.6% in the January 2023 filing, and below the reporting threshold in the January 2026 filing. A widely quoted alternative figure of 7.8% comes from one review site's tally of 410 models in its own catalogue, which is a count of reviewed products rather than a measure of the market. No equivalent Canadian survey exists.

Is fiberglass in a mattress as bad as asbestos?

No. The International Agency for Research on Cancer classifies glass wool and continuous filament glass as Group 3, meaning not classifiable as to carcinogenicity in humans, while asbestos is Group 1, a known human carcinogen. Fiberglass is a genuine skin, eye and respiratory irritant, and US occupational safety regulators state there is insufficient evidence that synthetic mineral fibres cause respiratory disease in humans.

Is fiberglass in mattresses legal in Canada?

Yes. Canada's federal Mattresses Regulations set a cigarette-ignition test and say nothing about fiberglass, so a mattress containing it can be sold legally to Canadians and imports are not screened for it. Canada also has no open-flame mattress standard, which is the US requirement that made fiberglass attractive to manufacturers in the first place. California will ban sales of mattresses containing textile fiberglass from 1 January 2027, and no Canadian jurisdiction has announced an equivalent.

What does fiberglass in a mattress look like?

Fiberglass from a mattress appears as thin shiny white or off-white threads, translucent fibres, or glitter-like particles that catch the light, and it is commonly mistaken for lint or dust. The fibres measured in mattress covers ran 5 to 10 microns thick. Under a flashlight held low at night, they shimmer, which is the practical way to find them on floors and furniture.

Do all memory foam mattresses have fiberglass?

No. Fiberglass appears mainly in budget foam and memory foam models, where the lowest-cost fire barrier is the usual route to passing the US open-flame standard, and the industry filings show the material has been falling for years while silica-embedded rayon has taken most of the category. Price band is a signal, not a guarantee, so the label and the manufacturer's written answer are what settle it for a specific model.

Has any mattress ever been recalled for fiberglass?

No. Zero of the 75 mattress recalls in the US Consumer Product Safety Commission's public database name fiberglass as the hazard, a second search cut of 82 records returns the same result, and Health Canada's database has no mattress recall citing it either. A mattress that keeps its fiberglass inside a sealed cover and passes its flammability test does not meet the definition of a defect under either country's rules.

Final Thoughts

The prevalence picture is better than the panic suggests and worse than the industry's silence implies. Fiberglass sat in 13.1% of US mattress interior fire barriers six years ago, fell to 8.6%, and is now reported by fewer than four surveyed producers. Controlled testing found it contained inside new mattresses, with nothing on the sleeping surfaces, and no mattress in either country has ever been recalled over it. The material is a real irritant, it is not asbestos, and the exposure risk is almost entirely about what happens when a cover is opened or torn.

For Canadian buyers, the fact that changes the decision is regulatory. Canada requires a cigarette test and no open-flame test, so nothing in Canadian law pushes a manufacturer toward a glass fire sock, and nothing in Canadian law stops one from being sold here either. That puts the decision back on the material list rather than the country of sale.

At Fawcett Mattress, we build natural mattresses in Canada for people who want to know every layer they sleep on, using organic Joma Wool, certified to Oeko-Tex STANDARD 100 for harmful substances, as the fire barrier, stitched with organic cotton, which is why no Fawcett mattress carries a fiberglass sock or a chemical fire retardant. The regulatory filings show wool going from 0.1% to 5.4% of US fire barriers in six years, so the industry is moving the same direction for the same reason. If you want to see how that is built, our natural latex mattresses show the full material stack.

Sources

1. California Bureau of Household Goods and Services: ISPA survey of flame-resistant fibers and materials used by mattress producers, January 2020 filing
2. California Bureau of Household Goods and Services: ISPA survey of flame-resistant fibers and materials used by mattress producers, January 2023 filing
3. California Bureau of Household Goods and Services: ISPA survey of flame-resistant fibers and materials used by mattress producers, January 2026 filing
4. Fiberglass and Other Flame-Resistant Fibers in Mattress Covers, International Journal of Environmental Research and Public Health
5. Estimating the impact of the mattress fire safety standard on bed fire outcomes, Fire and Materials
6. US Consumer Product Safety Commission: Fiberglass analysis of ticking and barrier fabrics in mattresses
7. California Department of Public Health: Factsheet on fiberglass and mattresses
8. Government of Canada: Mattresses Regulations, SOR/2016-183
9. 16 CFR Part 1633, standard for the flammability of mattress sets
10. OSHA: Synthetic mineral fibers, health effects
11. US Consumer Product Safety Commission: Recalls database
12. Health Canada: Recalls, advisories and safety alerts
13. National Capital Poison Center: Why do mattresses contain fiberglass?