Our #1 Recommended Mattress
Last Updated: March 2026 — Content reviewed and verified by our editorial team.
Saatva Classic. From $1,095
365-night trial · Lifetime warranty · Free white-glove delivery
Most mattress companies use any fire-proof option in their mattresses. They don't use it at their own will but are restricted by the US government's health and safety laws. A fire retardant helps to melt or reduce the fire spreading in case a mattress catches fire. Therefore, most manufacturers use Fiberglass that works exactly like a fire retardant.
They are a cost-effective fire retardant alternative, and most manufacturers use them in production to attract more sales targets due to the lower-price factor. So, that does work for the sellers, but did you know Fiberglass is highly dangerous for our health and safety? They have adverse health effects even though they have not been proven scientifically. Therefore, it's best to avoid them as much as possible, although they are a cheaper sleep option.
Our favorite fiberglass-free mattress for 2026 (#1 rated)
Does Lull Mattress use Fiberglass in their Gel-infused Memory Foam Mattresses?
Yes, they admit to using Fiberglass foam layers in their memory foam mattress and all-foam mattresses as a fire retardant but only in a small amount. But how small that is and whether, in reality, it is harmful or not is still unknown. However, the Lull mattress claims that this small amount is safe for human health while sleeping.
However, if you are still not content with even that small amount of Fiberglass in your mattress, we recommend Saatva mattresses as a Fiberglass-free mattress sleep option.
Why Do We Recommend Saatva over Lull Gel-Memory Foam Mattress?
Saatva mattresses do not have any Fiberglass, so your major worry should be gone now. Next, their mattresses contain high-quality organic materials along with natural ingredients used.
They avoid using non-toxic and dangerous chemicals in their manufacturing process. They are comparatively long-lasting and durable, with a lifetime warranty (check the top rated durable mattresses).
Saatva is a well-established mattress brand that offers handcrafted, US-certified, and luxurious mattresses with a 365-nights free trial.
Why Most Manufacturers Go For The Fiberglass Use Option?
Most manufacturers must use Fiberglass to abide by the US government's health and safety law of using the fire-proof option. Fiberglass is a flame retardant that slows down or melts the spreading of fire in a mattress.
But if you want a Fiberglass-free option, we recommend Saatva mattresses. They are Fiberglass-free and use all high-quality organic materials.
Call Lull Be Using Fiberglass in Their Mattresses Too?
Yes, Lull mattress admits to using Fiberglass as a flame retardant in their mattress. But they claim that it's just a small amount of Fiberglass that they use and is not harmful to sleep. That is because the US government restricts them from using a fire-proof option. So, therefore they use Fiberglass for that.
Where Is The Fiberglass In A Lull Mattress?
The Fiberglass is underneath the Lull mattress cover. It is just above the first foam layer of the three-layered memory foam beds. Fiberglass helps to slow down or melt the spreading of fire in case a Lull mattress catches fire.
What Is Inside The Lull Mattresses to Work as A Flame Retardant?
Lull mattress admits to using Fiberglass in their all-foam bed and innerspring mattresses as a flame retardant. They claim that it's just a tiny quantity that won't be dangerous for the health and safety of their users. However, we are not sure whether it is safe or not.
Fiberglass particles in a mattress can cause adverse health effects after some use, it includes eye, ears, nose, and lung irritation and infections.
Though these effects are not scientifically proven, many users have reported these issues after their experience. Therefore, we recommend using Saatva mattresses as a Fiberglass-free option.
How to Make Sure Whether The Lull Mattress Has Fiberglass?
First, Lull has admitted that they use a small amount of Fiberglass. So, this is enough to prove the existence of Fiberglass in their mattresses. Secondly, you can even check that on the mattress tag or label to double-check the quantity.
Why Does It Become Dangerous For Lull Mattresses to Have Fiberglass In Them?
It's not just about the Lull mattresses that Fiberglass is dangerous to use. Any mattress that has Fiberglass in them are hazardous to human health. Fiberglass can cause adverse health effects as it can jeopardize the condition of the eyes, nose, ears, and lungs by causing irritation or infection upon long-term use. Therefore, it is better to avoid it even though it sounds like a cheap option.
Do Lull Mattresses Come With Formaldehyde In Them?
Lull admits to having Fiberglass in their mattresses. But they are free of all hazardous chemicals such as Formaldehyde, heavy metals, ozone depleter, and any other flame retardant that can cause cancer.
What Brand of Mattress Has No Fiberglass?
Yes, Saatva mattress does not have any Fiberglass in them. The mattresses are safe, comfortable (check the most comfy mattresses), and luxurious for a good night's sleep. Saatva uses all-natural ingredients and organic, high-quality materials and is US-certified, with safety standards passed. They are also long-lasting and durable with their lifetime warranty and offer a 365-night free trial.
How Can You Tell By Looking That A Mattress Has Fiberglass?
You can only spot the Fiberglass from the mattress's inner part as it is inside the mattress's top comfort layer. To check it, you must take off the mattress cover first. The Fiberglass looks white with shine and gives a semi-transparent material look just like plastic threads.
Would It Still Be OK to Buy Lull Mattresses Despite Knowing They Have Fiberglass?
No one should answer with a straight Yes or No whether to buy Lull mattresses with Fiberglass after knowing it is there. They even avoid hazardous chemicals or substances. But let us not forget Lull admits to having Fiberglass in them.
Even though it is just a small quantity, no one can guarantee whether that small quantity is safe for long-term use. So, it is best to be careful about it before buying one. Also, avoidance can be a good option.
Is It That Much of an Issue to Have Fiberglass In A Mattress?
Yes, having Fiberglass in a mattress can be a severe issue. Fiberglass can cause serious health issues after a certain period of use time. It can cause eye, ear, nose, and lung problems like irritation and infections. Therefore, it is best to avoid them even though their adverse health effects haven't been scientifically proven.
However, it might be different in the case of Lull mattresses as they have a small quantity, as Lull claims. But we do not know whether that would still be dangerous or not. So, it's best to avoid it altogether if possible.
Our Top Mattress Pick
| Saatva Classic | $1,395+ | Shop |
| Saatva Contour5 | $1,595+ | Shop |
| Saatva Zenhaven | $1,895+ | Shop |
Does the Lull Mattress Have Fiberglass?
Lull is a popular direct-to-consumer mattress brand known for its competitive pricing. However, the question of fiberglass content has followed Lull - and many similar budget brands - for several years.
Reports and consumer reviews have indicated that some Lull mattress models do contain fiberglass as part of their fire-retardant barrier. The fiberglass is typically woven into a thin layer beneath the zippered outer cover. Lull’s care instructions warn against removing the mattress cover, which is a common indicator that fiberglass or glass fiber is present inside.
Multiple customers have reported fiberglass-related issues after unzipping their Lull mattress covers, including glass fiber particles spreading onto sheets, clothing, and bedroom surfaces. These experiences have been documented across consumer review platforms and complaint forums.
If you already own a Lull mattress, the most important precaution is to never remove the outer cover. If fiberglass has already been released, vacuuming with a HEPA filter, laundering all affected textiles, and potentially hiring a professional cleaning service may be necessary.
For future purchases, consider brands that transparently disclose their fire barrier materials and use fiberglass-free alternatives. Wool, silica, and plant-based rayon are common substitutes used by premium manufacturers. The Saatva Classic uses a thistle-based natural fire barrier - completely fiberglass-free. Priced at $1,779 for a Queen, it includes a 365-night trial, lifetime warranty, and free white-glove delivery, so you can evaluate it risk-free in your own home.
Material safety should weigh heavily in any mattress decision, especially for households with children or pets.
How to Choose the Right Mattress
With thousands of mattress options available, cutting through the noise requires focusing on what actually matters for your sleep quality and budget.
The Three Things That Matter Most
- Support and alignment. Your mattress should keep your spine in a neutral position regardless of sleep position. If you wake up with aches or stiffness, your mattress is failing at its primary job.
- Temperature regulation. Sleeping hot disrupts deep sleep cycles. Innerspring and hybrid mattresses with coil systems promote airflow far better than all-foam designs.
- Purchase protection. A generous trial period (100+ nights), strong warranty, and hassle-free returns protect you from an expensive mistake. Never buy a mattress you cannot return.
A Strong Benchmark
The Saatva Classic ($1,779 Queen) scores well on all three factors: coil-on-coil construction for support and airflow, a 365-night home trial for risk-free evaluation, and a lifetime warranty for long-term protection. Free white-glove delivery and old mattress removal are included with every order.
Our #1 Mattress Pick
The Saatva Classic combines innerspring support with premium comfort layers. Free white-glove delivery and a 365-night home trial.
Free delivery • 365-night trial • Lifetime warranty
