Does Casper Mattress Have Fiberglass? – Know The Truth!

The Casper mattress contains fiberglass in its material. But many theories regarding the issue on the internet say it contains silica. Well, it is partially true. The material fiberglass has around 65% of silica in its construction.

You can find much information online that the Casper mattress contains  Silica and not Fiberglass. But theoretically, the fire sock is made of fiberglass and contains silica. People have developed uncertainty about silica and fiberglass because of their construction.

However, the article will further discuss fiberglass and why it is used in mattresses and the controversy over fiberglass in Casper mattresses. Also, this will discuss the health risks of fiberglass exposure and how to avoid fiberglass in mattresses. Please read till the end to gain inside information about it. 

What is Fiberglass, and Why is it Used in Mattresses?

Video Credit : Erin O’Brien

Fiberglass is made of glass and FRP (Fiber reinforced plastic). It is used in many places, such as aircraft, boats, and mattresses. Typically, fiberglass is used in mattresses as a fire retardant.

This material is long-lasting. But this is a toxic material, and it harms people. Then why do they put fiberglass in Mattresses?

Fiberglass acts as a flame retardant for mattresses. The fiberglass will protect the mattress from fire. When the mattress gets fire, the flame won’t spread to the other parts because of the way it is made of.

The material makes the mattress melt in the event of a fire. So, it can’t do that when the fire is ready to spread through the mattress. The material saves the mattress from fire.

The Controversy Over Fiberglass in Casper Mattresses

Many controversies are made regarding the fiberglass in Casper mattresses. Some theories say that Casper mattresses do not contain fiberglass. On the other hand, many people think that Casper Mattresses contain fiberglass.

Casper said – The fire sock of the Casper mattresses are made of fire-resistant rayon thread. The core contains fiberglass. The fiberglass is enclosed in the rayon thread. So the fiberglass won’t harm anyone.

Well, considerable research has been done regarding it, and it has come out that Casper uses fiberglass in mattresses.

Many customers were complaining about Casper mattresses leaking fiberglass. Also, Casper stated that the silica thread is fiberglass used to make fire socks.

But the internet has different information spread around. But you need to understand that the most significant proof is the customers suffering regarding the leaking fiberglass issue.

The Health Risks of Fiberglass Exposure

The Health Risks of Fiberglass Exposure

The mattress can wear out anytime. And then, the fire sock made of fiberglass will start leaking fiberglass out of the mattress. It can harm human health badly. According to physicians and researchers, there are multiple facts about the health risks of fiberglass exposure.

Let’s check the health risks of fiberglass exposure –

Eyes Problem

Study shows that fiberglass exposure can create eye irritation. The particles of fiberglass will get into the eye and turn it red. Additionally, your eyes will itch a lot. You may even lose eyesight in the worst cases.

Skin problem

Skin exposure to fiberglass will create rashes in your skin. As a result, you may feel an itchy sensation in the skin. Besides, if you have pale skin, the inflammation will be red. Additionally, your skin will swell because of this problem. But the skin problems go away after a few hours of exposure.


Exposure to fiberglass will also lead to stomach problems. When the fiberglass is leaked from the mattress, the fibers can get mixed with the air. As a result, it will end up in your stomach, causing you gastrointestinal issues and stomach irritation.

Coughing and sneezing

Fiberglass exposure will also lead you to have cough and sneezing problems. The fibers will mix up with air which will get into your nose through inhaling. It can cause you to have asthma issues as well. Besides, the fibers will get into your throat and create soreness. Consequently, you will have coughing issues.

Lungs problem

Fiberglass can badly impact your lungs. The fibers get into the lung and trap in the upper airway. But the fibers are released through the defense mechanism of the body.

How to Avoid Fiberglass in Mattresses?

Look through the below points to know about it –

Always put the mattress topper

The fire sock inside the mattress contains fiberglass. But sometimes, the mattress can wear up, leading the fiberglass to come out from the mattress.

But if you put on a mattress topper on the mattress, the fiberglass won’t be able to harm you as much as it can with the exposed mattress.

Change the mattress

If you want a simpler solution, consider not using the mattress you already purchased with fiberglass inside. It will save you from potential danger and health risks. Just replace the fiberglass mattress with one which does not have fiberglass in it. But it will be a costly modification, no doubt.


This section covers the frequently asked questions on Casper Mattress.

Can I flip my Casper mattress?

Yes, you can flip your Casper mattress depending on the type of Casper mattress you have. The Original and Wave mattresses should not be flipped, while the Nova mattress can flip. Generally, most modern mattresses are designed to be one-sided, meaning they are not conducive to flipping. If you have confirmed that your Casper mattress is flippable, then you can flip it.

Is Casper Mattress a Good Quality Mattress?

When it comes to choosing a mattress, quality is a top priority. Casper mattress is generally considered to be of good quality. The mattress is made with CertiPUR-US® certified foams and provides a comfortable sleeping experience and good support for the spine. 

Do Casper mattresses make you hot?

Casper mattress is designed with temperature regulation in mind, and it tends to trap less heat than many all-foam mattresses. The top memory foam layer of the Casper Original has thousands of perforations that allow air to circulate and dissipate heat away from the sleeper’s body. Overall, while Casper mattresses may not actively cool down hot sleepers, they are designed to regulate temperature and minimize heat retention. 

What is the weight limit for Casper mattress?

There is no official weight limit for a Casper mattress. However, some sources suggest that the Casper Original, which is made entirely of foam, may be best suited for sleepers who weigh 230 pounds or less.


The Casper mattress contains fiberglass. Many customers on the internet have reported the issue of fiberglass leaking out of their mattresses. According to Casper themselves, their mattresses contain fiberglass inside fire socks.

So, if the mattress is worn out, the fiberglass can come out. It creates health risks such as skin rashes, irritation, and eye, lung, and stomach issues.

It is used as a flame retardant but can be a severe issue when the mattress leaks. You may want not to take health risks. Consider replacing the mattress and using one without fiberglass. You also can use the mattress cover to save you from danger.

.video_css video  {
    width: 54% !important;
Photo of author

Rene C. Evans

Hi, I'm Rene C. Evans author and owner of this website. Though this website is not related to manufacturing company of mattresses but I extensively studying, and analyzing mattresses and inform you solutions regarding mattress problem that will help you to take rest properly.

Leave a Comment