Short answer: Some do. Synthetic rugs made from polyester, nylon, or polypropylene can release VOCs (volatile organic compounds) into your home's air, and that off-gassing is strongest in the first few weeks. Rugs made from natural, untreated fibers like organic cotton and wool release far fewer, or none. If off-gassing is your concern, the fix is simple: choose a natural-fiber rug with a real certification, and skip synthetic materials and added chemical treatments.
By Sandy Wong, Founder of Rugs by Roo. Mom of three.
Let me clear up the confusion around this one, because it gets talked about in two extremes.
One camp says every rug is a toxic cloud. The other says off-gassing is a myth. Neither is quite right, and the truth is actually pretty freeing once you understand it.
What “off-gassing” actually means
Off-gassing is when a material releases gases into the air, and that “new rug smell” you sometimes notice is exactly that.
Those gases are called VOCs, volatile organic compounds. In rugs, they can come from synthetic fibers, adhesives, dyes, backings, and any chemical finishes added at the factory.
It's usually heaviest when a rug is brand new and fades over the following weeks, though with some materials it can linger longer.
Which rugs off-gas, and which don't
Here's the part that makes the decision simple.
More likely to off-gas:
- Synthetic fibers like polyester, nylon, and polypropylene (these are plastics made from petroleum)
- Rugs with latex, PVC, or plastic backings
- Rugs treated with stain-resistant, water-repellent, or flame-retardant finishes
Much less likely to off-gas:
- Natural, untreated fibers like organic cotton and wool
- Rugs with no synthetic backing
- Rugs with no added chemical treatments
So off-gassing isn't really about rugs in general. It's about synthetic and treated rugs specifically. Change the material, and you change the whole equation.
What the VOCs can include
To be straightforward with you, without the scare tactics: the compounds most often discussed in this context include formaldehyde, which is a known carcinogen and a respiratory irritant, along with others like toluene and styrene. Certain flame-retardant chemicals used on some rugs have also been studied for links to hormone and developmental effects.
I'm not telling you this to frighten you. I'm telling you because you deserve the real reason natural materials matter, instead of just being told “trust us, it's better.” The reason is simple: fewer added chemicals means less to off-gas in the first place.
This is also why it matters more for the little ones. Babies, kids, and pets spend the most time down on the floor, right where a rug lives.
How to avoid it (the easy version)
You don't need an air-quality meter. You need a short checklist:
- Choose natural fibers. Organic cotton or wool over polyester, nylon, or polypropylene.
- Look for a real certification. OEKO-TEX tests finished products for harmful substances, and GOTS goes further by certifying organic fibers and the whole supply chain. (Here's what GOTS means.)
- Skip the chemical finishes. No added stain-proof, waterproof, or flame-retardant treatments.
- Air out any new rug. Even a clean rug benefits from a day of fresh air and good ventilation when it first arrives.
What we make
Every rug on our site is chosen with this in mind, and each one carries a ROO Rating, our Good/Better/Best score, so you can see how clean it is before you buy.
Our Tuft Love collection is a machine-washable rug made from GOTS-certified organic cotton, which means natural fibers, clean dyes, and no plastic coating to off-gas. (If you've been eyeing a washable synthetic rug instead, this guide walks through the difference.)
Frequently asked questions
Do all rugs off-gas?
No. Synthetic rugs (polyester, nylon, polypropylene) and rugs with plastic backings or chemical treatments are the ones that off-gas VOCs. Natural, untreated rugs like organic cotton and wool release far fewer, or none.
How long does a rug off-gas?
For rugs that do off-gas, it's usually strongest in the first few weeks and fades over time. Some treated or heavily synthetic rugs can continue longer. Natural-fiber rugs have little to release to begin with.
Do wool rugs off-gas?
Untreated wool is a natural fiber and off-gasses very little. Just watch for wool rugs with synthetic backings or added treatments, which can change that.
How do I stop a new rug from off-gassing?
The most reliable way is to choose a natural-fiber, certified, untreated rug in the first place. With any new rug, airing it out with good ventilation when it arrives also helps.
If you've ever unrolled a new rug, caught that chemical smell, and felt a little uneasy about it, that instinct was worth listening to. You don't have to become an expert. You just have to know that the material is the whole story.
Come see what a rug looks like when there's nothing to air out. Order a swatch, or reply and ask me anything. I read every message.
Warmest,
Sandy
Sandy Wong is the founder of Rugs by Roo and host of the Healthy Home Summit. A former CPA and mom of three, she started the company after struggling to find a rug that was both safe for her kids and durable enough to survive them. Rugs by Roo has served thousands of families and holds a 4.8-star rating across 337 reviews.