Do mattress covers have fiberglass, and how can you tell what’s inside?
As a mattress owner, I’ve worried about hidden materials like fiberglass affecting my health.

Fiberglass in covers can pose risks if exposed, but spotting it isn’t always easy.
This article dives into why fiberglass is used, how to identify it safely, and tips to choose fiberglass-free covers, all with practical, user-friendly advice to keep your sleep environment safe.
Why Fiberglass Is Used in Mattress Covers
Fiberglass, or glass wool, is a cheap, fire-resistant material woven into some mattress covers to meet U.S. Consumer Product Safety Commission (CPSC) flammability standards.
Memory foam mattresses, being highly flammable, often include a fiberglass layer beneath the outer cover to slow fire spread by melting instead of igniting.
This cost-effective solution is common in budget mattresses under $600 for a queen, like some Zinus or Lucid models.
However, if the cover tears or is removed, fiberglass particles can escape, causing skin irritation, respiratory issues, or home contamination.
Do Mattress Covers Have Fiberglass and How to Know Inside?
Direct Answer: Some mattress covers have fiberglass, especially in budget memory foam mattresses, used as a fire retardant. To check, inspect the label for terms like “glass fiber” or “fiberglass.” Avoid unzipping or removing the cover, as this releases particles. Contact the manufacturer or check their website for material details. Shine a flashlight across the cover to spot shiny, translucent fibers. Use a mattress protector to contain potential leaks.
How to Identify Fiberglass in Mattress Covers
Check the Mattress Label
Look for terms like “fiberglass,” “glass fiber,” or “glass wool” on the care label. If it says “do not remove cover,” assume fiberglass may be present, as noted by the California Department of Public Health.
Contact the Manufacturer
If the label is unclear, email or call the manufacturer to confirm materials. Reputable brands like Nectar or Leesa often disclose fiberglass-free status online.
Visual Inspection
Without unzipping, use a flashlight to scan the cover’s surface. Fiberglass appears as shiny, white, thread-like strands, resembling plastic or silk. Avoid touching if visible to prevent irritation.
Check Online Reviews
Search for your mattress model on sites like Amazon or Reddit for user reports of fiberglass issues. Filter for low-star reviews to spot complaints about itching or contamination.
Look for Budget Indicators
Mattresses under $600, especially imported ones, are more likely to contain fiberglass. Brands like Zinus or Novaform have faced lawsuits over fiberglass exposure.
Health Risks of Fiberglass in Mattress Covers
Fiberglass can cause skin rashes, itchy eyes, or respiratory issues like bronchitis if inhaled, especially if the cover is damaged.
A 2022 study found up to 1% of fiberglass can migrate to outer layers, risking exposure if unzipped.
Long-term inhalation may lead to lung inflammation or pulmonary fibrosis. Social media reports, like a TikToker’s experience with contamination, highlight how fibers can spread to carpets or HVAC systems, requiring costly cleanup.
Steps to Protect Yourself
Use a Mattress Protector
A zippered, fiberglass-trapping protector (e.g., SafeRest, $20-$40) adds a barrier to contain fibers. Ensure it’s waterproof and breathable for comfort.
Avoid Removing the Cover
Never unzip or wash the mattress cover unless the label confirms it’s safe. Spot clean with mild detergent instead.
Vacuum Regularly
Use a HEPA-filter vacuum to remove dust or potential fibers from the mattress surface. Avoid aggressive scrubbing to prevent tears.
Replace Old Mattresses
Mattresses over 8 years old or with worn covers are riskier. Consider fiberglass-free options like latex or organic cotton mattresses from Avocado or Birch.
Unique Insights for Safety
Unlike most guides, we recommend using a high-intensity flashlight at a low angle to detect fiberglass without touching the mattress, minimizing exposure risk.
Also, check your HVAC system’s filter monthly if you suspect fiberglass, as particles can spread through air ducts.
For pet owners, keep animals off the bed to prevent scratching, which can tear covers and release fibers. These steps address overlooked risks for a safer sleep environment.
Fiberglass-Free Alternatives
- Organic Mattresses: Brands like Avocado or Birch use wool or cotton as natural fire retardants, costing $900-$2,000 for a queen.
- Latex Mattresses: Often fiberglass-free, like Saatva’s Zenhaven ($1,500-$3,000), offering durability and breathability.
- Premium Brands: Leesa (post-2023) and Nectar now use rayon or chemical-free barriers, starting at $700.
- Certifications: Look for GOLS or USDA Organic labels, which often indicate fiberglass-free materials, but verify with the manufacturer.
Common Myths About Fiberglass in Mattresses
Some believe CertiPUR-US certification means no fiberglass, but it only applies to foam, not covers.
Others think all memory foam mattresses have fiberglass—many premium brands don’t. Another myth is that fiberglass is safe if contained; worn covers can still leak particles over time.
Always check labels and avoid unzipping, even if the cover has a zipper, to prevent exposure.
FAQs About Do Mattress Covers Have Fiberglass and How to Know Inside
1. How can I tell if my mattress cover contains fiberglass?
Check the mattress label for “fiberglass,” “glass fiber,” or “glass wool.” If it says “do not remove cover,” assume fiberglass may be present. Shine a flashlight at a low angle to spot shiny, translucent threads without unzipping.
Contact the manufacturer or check their website for material details. Online reviews for your mattress model may also reveal fiberglass issues.
Use a zippered protector to contain potential leaks and avoid health risks like skin or lung irritation.
2. Is fiberglass in mattress covers dangerous?
Fiberglass is safe if contained within an intact cover but dangerous if exposed. Damaged or unzipped covers can release particles, causing skin rashes, eye irritation, or respiratory issues like bronchitis. A 2022 study found 1% of fiberglass can migrate to outer layers, risking exposure. Airborne fibers may spread via HVAC systems, requiring costly cleanup. Use a mattress protector and avoid removing the cover to minimize health risks.
3. Can I wash a mattress cover if it has fiberglass?
Never wash a mattress cover unless the label confirms it’s fiberglass-free and washable. Unzipping or washing can release fiberglass particles, contaminating your home and causing skin or respiratory issues. Spot clean with mild detergent and a damp cloth instead. If the cover is stained, use a waterproof mattress protector to cover it. Check manufacturer instructions, as brands like Zinus warn against removal due to fiberglass risks.
4. What should I do if my mattress cover has fiberglass?
If your mattress cover has fiberglass, keep it intact and avoid unzipping. Add a zippered, fiberglass-trapping mattress protector for safety. Vacuum the surface with a HEPA filter to remove dust. If the cover is torn, consult a professional cleaner to handle fiberglass contamination, as DIY cleanup risks spreading fibers. Consider replacing the mattress with a fiberglass-free option like Avocado or latex for long-term safety.
5. Are there mattress covers without fiberglass?
Yes, many mattress covers are fiberglass-free, especially from premium or organic brands.
Look for covers made of cotton, wool, or rayon, like those from Avocado or Saatva.
Check for GOLS or USDA Organic certifications, but verify with the manufacturer, as CertiPUR-US only applies to foam.
Prices range from $20-$100 for protectors. Read labels and reviews to ensure no fiberglass is used, prioritizing natural fire retardants.
Conclusion
Do mattress covers have fiberglass, and how can you know what’s inside?
Some budget mattress covers contain fiberglass as a fire retardant, posing risks if exposed. Check labels, contact manufacturers, and use a flashlight to spot fibers safely.
Protect yourself with a mattress protector and avoid unzipping covers. Opt for fiberglass-free options like organic or latex mattresses for peace of mind.
Stay informed to keep your sleep space safe and healthy.