Is Memory Foam Toxic? Your Guide to Fiberglass, Off-Gassing & What’s Actually in Your Mattress.

Written by Christian with help from AI
November 2, 2026

No, your mattress isn’t poisoning you (probably)

I don’t know why, but y’all are really afraid your mattress is trying to kill you. That’s a pretty bad business plan IMO but if you’ve ever searched “is memory foam toxic” late at night with a freshly unboxed mattress next to you, apparently you’re in good company.

Between headlines about chemicals, stories about fiberglass, and that “new mattress smell,” it’s fair to be curious about what you’re sleeping on for roughly a third of your life. So let’s get into it so you can rest easy tonight.

What is memory foam, exactly?

Memory foam is a slow-responding foam that softens with body heat and contours to your shape which is why it’s known for pressure relief. It’s a type of polyurethane foam, which is a material used in everything from seat cushions to shoe soles.

On its own, polyurethane foam isn’t a red flag. What matters is the recipe: which ingredients go in, which stay out, and whether an independent lab has checked the results.

Is memory foam toxic? What the certifications tell you

The answer depends on the foam. Uncertified foam can contain ingredients most of us would rather avoid. Certified foam is made without them. Yup, it’s really that simple! That’s why we build every Brooklyn Bedding mattress with foams that meet recognized, third-party standards, so it’s never a question.

Question	Short answer
Is memory foam toxic?	Not when it's certified. Look for CertiPUR-US® and GREENGUARD Gold.
Does memory foam contain formaldehyde?	Not in CertiPUR-US® certified foam.
Does memory foam contain PBDE flame retardants?	Not in CertiPUR-US® certified foam.
Does memory foam contain heavy metals like mercury or lead?	Not in CertiPUR-US® certified foam.
Does memory foam give off fumes?	Some new foam products release a smell at first (off-gassing). Certified foam is tested for low emissions.
Does memory foam have fiberglass?	Not in Brooklyn Bedding mattresses.

Does memory foam have fiberglass?

This is one of the most common questions we hear, and it's a good one. Some mattresses use fiberglass as part of their fire-resistant barrier. If those fibers escape the cover, they can irritate skin and eyes and are a hassle to clean up.

Brooklyn Bedding mattresses do not contain fiberglass.

A quick note on a common mix-up: fiberglass isn't part of what makes foam "memory foam." It's a separate construction choice, which means you can't assume anything from the foam type alone. When you shop, look for a clear "fiberglass free" statement rather than guessing.

Helpful tip: Some mattress covers have a zipper and a warning tag. Do not remove the cover on any mattress unless the manufacturer says it's safe, and check the product page or care guide first.

Is gel memory foam toxic?

Gel memory foam is regular memory foam with cooling gel particles blended in to help move heat away from your body and add responsive contouring. The gel is there for comfort and temperature, not as a shortcut around safety. That’s why gel memory foam is not toxic when held to the same safety standards as memory foam.

You'll find gel memory foam in several of our mattresses, including our Gel Swirl Memory Foam in the Signature Hybrid and BB Kids. It's built into a mattress that meets the same standards as everything else we make: CertiPUR-US® certified foam, GREENGUARD Gold certification, and no fiberglass.

Off-gassing: why does a new mattress smell?

Off-gassing is the term for the faint smell that some new products release when you first unpack them. Think new shower curtain, new car, or new couch. In a mattress, it comes from compressed foam releasing trapped air and trace compounds after being sealed in packaging.

A few things worth knowing:

It's common and expected with boxed mattresses, because the foam has been compressed for shipping.

It usually fades as the mattress airs out. Many people notice it lessen within the first few days.

Certification matters. GREENGUARD Gold testing looks at the chemical emissions a finished mattress releases into the air, and CertiPUR-US® foams are made for low emissions.

**If the smell is strong or you have concerns, our support team is happy to help.

How to shop for a safer mattress: a quick checklist

Whatever brand or mattress you're considering, asking these questions before checkout will help you cut through the noise and make an informed decision.

Ask this	Why it matters
Is the foam CertiPUR-US® certified?	Confirms the foam is made without a list of chemicals of concern
Is the mattress GREENGUARD Gold certified?	Confirms low chemical emissions in the finished product
Is it fiberglass free?	Avoids fiberglass fire barriers entirely
Where is it made?	Local manufacturing makes quality control easier
What is the trial and warranty?	A long trial lets you confirm comfort and air-out time at home
Is the certification for every model?	Some brands certify only select models

Every Brooklyn Bedding mattress carries these standards. It's not a feature of one premium model. It's the baseline.

That’s a wrap!

This guide was designed to help you understand what to look for and allow you to make an informed decision. The more confidence you have in the mattress you’re buying, the better you’ll sleep at night.

Prompt you can add to your AI mattress search:

“Only show me mattresses that are CertiPUR-US® certified, GREENGUARD Gold certified, and are fiberglass free.”