Fiberglass is a common material in mattress construction due to its fire-resistant properties. While older Casper mattresses include fiberglass, all new models are completely fiberglass-free, offering a comfortable sleep experience without compromising on quality.
When shopping for a new Casper mattress, a few questions may come to mind, like which mattress provides the perfect balance of comfort and support? How durable is it, and will it hold up over time? And, perhaps most importantly, do Casper mattresses have fiberglass?
At Casper, we know a mattress is more than just a place to sleep — it’s an investment in your comfort and overall well-being. Knowing what’s inside can help you rest even easier.
In this guide, we explore the Casper approach to mattress materials, safety, and comfort so you can sleep soundly knowing you’ve made the right choice.
The Role of Fiberglass in Mattress Manufacturing
When it comes to mattress manufacturing, creating a safe product for sleepers is critical. To that end, several features are carefully integrated into each mattress design. One of those features is fire safety.
All mattresses sold in the U.S. are required to meet federal flammability standards (16 CFR 1632 and 1633), which ensure they can withstand open flames and smoldering ignition sources.1
To comply with these regulations, many mattress manufacturers incorporate fire-resistant materials like fiberglass into their designs.
Here’s how fiberglass fits into the equation1:
- Fire safety first – Fiberglass helps create an effective barrier against heat and flames, keeping the mattress safe in the event of a fire.
- Durability matters, too – Fiberglass is also used in some mattress designs to improve durability, ensuring that the mattress maintains its structural integrity over time.
This combination of fire safety and durability was a reliable solution in the past — but as mattress technology has advanced, so too has the Casper approach to design.
Let’s take a look at some older Casper models and how fiberglass was used in their construction.
Some Old Casper Mattress Models Contain Fiberglass
Casper has always been committed to creating high-quality, comfortable, and safe sleep solutions. Some of our earlier models used fiberglass to meet fire safety standards. These models include:
- Original
- Original Hybrid
- Nova Hybrid
- Wave Hybrid
- Atlas
- Dawn
But why fiberglass in the first place?
Why Did Some Old Casper Models Use Fiberglass?
Fiberglass was once a common choice in mattress design. As mentioned, it provided a safe, effective way to meet federal fire safety standards.2
In some older Casper models, it acted as a protective barrier, helping the mattress resist open flames without the use of harmful chemicals.
These designs used fiberglass in the form of a fire-resistant “fire sock,” a protective barrier that prevented ignition. The fiberglass was securely enclosed within the mattress to minimize any risk of exposure.3
That said, Casper has since evolved our designs, moving away from fiberglass in favor of new materials that maintain safety while enhancing overall peace of mind.
Casper Mattress Models that Do NOT Contain Fiberglass
Every new Casper model is completely fiberglass-free, and our new mattress lineup reflects how our design approach has evolved over time:
- A fiberglass-free selection – Casper mattress models that do not contain fiberglass include:
- Use of next-gen fire barriers – These new mattress models utilize rayon or proprietary silica blends to ensure fire safety without the concerns linked to fiberglass.
- Safety without sacrifice – All Casper mattresses continue to be thoughtfully engineered for comfort, breathability, and long-term peace of mind.
With these upgrades in place, you can rest assured — your Casper mattress provides a cozy, comfortable, and safe place to rest your head.
If you're wondering how to check if your non-Casper mattress contains fiberglass, there are a few simple steps you can take.
How to Tell If Your Non-Casper Mattress May Contain Fiberglass
Taking a closer look at your non-Casper mattress can help you make an informed decision about what you're sleeping on.
To tell if your non-Casper mattress may contain fiberglass1:
- Review the product label – Check the materials list for terms like “glass fiber,” “fiberglass,” or “fire sock.” These terms could indicate the presence of fiberglass.
- Contact customer support – If the label isn’t clear, don’t hesitate to reach out to the manufacturer. They should be able to confirm whether fiberglass was used.
- Inspect with a flashlight – If you can access the inner cover, shine a light on it. Shimmering, thread-like particles could be a sign of fiberglass.
Knowing what’s inside your mattress matters. With a commitment to transparency and ongoing innovation, Casper continues to design mattresses that meet the highest safety and comfort standards so that you can rest easy, night after night.
The Casper Commitment to Safety and Ongoing Innovation
At Casper, safety and comfort go hand in hand. While some older models used fiberglass as a fire barrier, all new Casper mattresses are completely fiberglass-free, constructed instead with advanced materials that meet safety standards without compromising comfortability or peace of mind.
The bottom line? Casper has been and always will be dedicated to innovation, quality, and most importantly, your best night’s sleep.
Shop Casper today to experience the difference for yourself.
Sources:
- Sleep Foundation. Fiberglass in Mattresses: What Does It Do and Is It Safe? https://www.sleepfoundation.org/mattress-information/fiberglass-in-mattress
- American Chemical Society. What’s fiberglass, and how does the delicate material reinforce thousands of products? https://cen.acs.org/materials/inorganic-chemistry/s-fiberglass-does-delicate-material/96/i38
- National Library of Medicine. Fiberglass and Other Flame-Resistant Fibers in Mattress Covers. https://pmc.ncbi.nlm.nih.gov/articles/PMC8835476/
