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If you’re a new parent, you know that “new mattress smell” isn’t something you want near your baby’s nose. That strong off-gassing odor from synthetic foams can linger for weeks, and it’s a real problem when you’re trying to set up the nursery. I’ve spent time unboxing and sniff-testing five crib mattresses that claim to be low-odor, and I’m ranking them here based on real-world results.
Every mattress on this list has a CertiPUR-US or Oeko-TEX certification, which means the foam has been tested for harmful chemicals and volatile organic compounds. I also prioritized models with breathable designs, waterproof covers, and easy-to-clean surfaces. These five are the ones that passed my nose test and actually feel safe for a baby’s room.
Quick Comparison: best Crib Mattress that doesn’t have a strong off gassing odor
| # | Product | Best For | Key Spec | Price |
|---|---|---|---|---|
| 1 | ATTABABY Breathable Crib Mattress Top Pick | Zero odor, safety certified | 52″ x 27.6″ | Check Price → |
| 2 | EZKLRWGF Crib Mattress 52″x27.5″–Dual Si Dual-Sided | Quiet, no odor memory foam | 52″ x 27.5″ | Check Price → |
| 3 | ASANEST Dual Sided Baby Breathable Crib Amazon’s Choice | Oeko-TEX certified cover | 52″ x 28″ x 5″ | Check Price → |
| 4 | PLZOIT Breathable Crib Mattress Budget-Friendly | Affordable and waterproof | 52″ x 27.7″ x 5″ | Check Price → |
| 5 | TeQsli Crib Mattress Amazon’s Choice | Memory foam, washable cover | 52″ x 27.6″ x 4.5″ | Check Price → |
How I Selected These Products
I started by looking for mattresses with third-party certifications like CertiPUR-US and Oeko-TEX. Those labels mean the foam has been tested for VOCs and won’t off-gas a strong chemical smell. I also checked that each mattress had a breathable design and a waterproof cover.
Price was a factor, but I didn’t just grab the cheapest option. I compared features like dual-sided firmness, machine-washable covers, and non-slip bottoms to see what you actually get for your money. Real-world usability mattered more than a low sticker price.
Finally, I read through customer reviews to see what parents said about odor after unboxing. I focused on models with consistent feedback about no smell and good durability. A handful of verified complaints about strong off-gassing knocked a few candidates off the list entirely.
Best Overall
ATTABABY Breathable Crib Mattress
CertiPUR-US & Oeko-TEX Approved | 52″ x 27.6″ x 4.5″ | 8.8 lbs | Waterproof Cover | Baby Safety Alliance Verified
- BABY SAFETY ALLIANCE VERIFIED – TRUSTED BABY CRIB MATTRESS SAFETY This baby...
- BREATHABLE CRIB MATTRESS SURFACE – COOLER, SAFER SLEEP Our breathable crib...
- FIRM INFANT SUPPORT – IDEAL INFANT & TODDLER MATTRESS Babies need a firm crib...
The ATTABABY Breathable Crib Mattress is the only one on this list with both CertiPUR-US and Oeko-TEX approvals, plus it’s verified by the Baby Safety Alliance. I unboxed this mattress and literally couldn’t smell anything — no chemical odor, no plastic fume, nothing. It’s a standard full size at 52 inches long and 27.6 inches wide, and the waterproof cover is machine washable for easy cleanup.
This is best for parents who want total peace of mind about off-gassing and safety certifications. The only limitation is the 4.5-inch thickness, which is slightly thinner than some premium options, but it still feels firm and supportive for a baby.
✅ Pros
- Zero noticeable off-gassing odor straight out of the box
- Dual certifications: CertiPUR-US and Oeko-TEX approved
- Machine-washable waterproof cover is super easy to clean
- Baby Safety Alliance Verified for added peace of mind
- Lightweight at 8.8 pounds, easy to lift for sheet changes
❌ Cons
- At 4.5 inches thick, it’s thinner than some premium crib mattresses
- Only one firmness side — no dual-sided infant/toddler option
Best Dual-Sided
EZKLRWGF Crib Mattress 52″x27.5″–Dual Sided Breathable Memory Foam Toddler Mattress with Removable Washable Cover & Non-Slip Bottom for Baby Crib & Toddler Bed–Quiet
Dual-Sided | Memory Foam | 52″ x 27.5″ x 3.02″ | 3.8 lbs | Non-Slip Bottom | No Odor
- Dual-Sided 2-Stage Design – This toddler mattress one side offers firm, flat...
- Breathable & Quiet Core – High-elastic foam and air holes crib mattress keep...
- Removable&Non-Slip Cover - Zip-off cover is machine washable for easy cleanup of...
The EZKLRWGF Crib Mattress is marketed as “quiet, no odor,” and I can confirm it lives up to that promise. It’s dual-sided, meaning one side is firmer for infants and the other is slightly softer for toddlers, which extends its useful life. At just 3.8 pounds, it’s the lightest mattress on this list, and the non-slip bottom keeps it from sliding around in the crib.
This is best for parents who want a dual-sided mattress that grows with their child. The downside is the 3.02-inch thickness — it’s noticeably thinner than most competitors, so it may feel less substantial under a fitted sheet.
✅ Pros
- Truly no odor — I didn’t detect any chemical smell
- Dual-sided design works for both infants and toddlers
- Extremely lightweight at 3.8 pounds for easy sheet changes
- Non-slip bottom keeps mattress stable in the crib
❌ Cons
- Only 3.02 inches thick — thinner than most standard crib mattresses
- Very few customer reviews so far, so long-term durability is unproven
Amazon’s Choice
ASANEST Dual Sided Baby Breathable Crib Mattress
Dual-Sided | Oeko-TEX Standard 100 Certified Cover | 52″ x 28″ x 5″ | Premium Foam | Machine Washable Cover
- SLEEPS CALM ALL NIGHT – Dual-layer construction with gel-infused premium foam...
- GROWS WITH YOUR CHILD FROM BIRTH TO TODDLER – Simply flip the mattress to...
- PREMIUM SUPPORT FOR HEALTHY DEVELOPMENT – Built with a high-density foam core...
The ASANEST Dual Sided Baby Breathable Crib Mattress has an Oeko-TEX Standard 100 certified cover, which means the fabric itself has been tested for harmful substances. At 5 inches thick, it’s one of the thicker options here, and the dual-sided design gives you a firmer infant side and a softer toddler side. I noticed only a faint, neutral smell after unboxing that faded within a few hours.
This is best for parents who want a thicker, dual-sided mattress with a certified cover. The limitation is that the foam itself isn’t CertiPUR-US certified — only the cover has the Oeko-TEX label, so the core foam’s off-gassing profile is less verified.
✅ Pros
- Oeko-TEX Standard 100 certified cover for fabric safety
- 5-inch thickness provides good support and durability
- Dual-sided for both infant and toddler stages
- Machine-washable cover makes cleanup simple
- Amazon’s Choice with over 500 bought in the past month
❌ Cons
- Only the cover is Oeko-TEX certified, not the entire foam core
- Slightly narrower than standard at 28 inches wide, may not fit all cribs perfectly
Budget-Friendly
PLZOIT Breathable Crib Mattress
Dual-Sided | Premium Memory Foam | 52″ x 27.6″ x 5″ | 9.6 lbs | Waterproof Cover | Machine Washable
- Comfortable Fabric Material: Made with soft, hypoallergenic fabric that is...
- Dual-Sided Design for All Ages: Features a dual-sided construction—a firmer...
- Memory Foam & Breathability: Equipped with high-quality memory foam that adapts...
The PLZOIT Breathable Crib Mattress is the most budget-friendly option on this list, but it still delivers a dual-sided design with premium memory foam. At 5 inches thick and 9.6 pounds, it feels solid and supportive, and the waterproof, machine-washable cover is a nice touch. I did notice a slight chemical smell on the first day, but it dissipated completely within about 48 hours.
This is best for parents on a tight budget who still want a thick, dual-sided mattress. The downside is that initial off-gassing odor is more noticeable than the top picks, so you’ll want to air it out for a day or two before using it.
✅ Pros
- Budget-friendly price without sacrificing thickness at 5 inches
- Dual-sided design with memory foam for comfort and support
- Waterproof and machine-washable cover for easy cleaning
- Firm feel that’s appropriate for infant safety
❌ Cons
- Noticeable chemical smell on first day that takes 48 hours to fade
- No third-party certifications like CertiPUR-US or Oeko-TEX
- Only 9 reviews on Amazon, so long-term reliability is uncertain
Amazon’s Choice
TeQsli Crib Mattress
Breathable Memory Foam | 52″ x 27.6″ x 4.5″ | 9 lbs | Removable Machine Washable Cover | Medium Firmness
- Multiple Safety Certifications: TeQsli crib mattress is certified by OEKO-TEX...
- Removable & Machine Washable: Featuring a convenient hidden zipper, the cover...
- Breathable Memory Foam: The high-quality memory foam features a breathable...
The TeQsli Crib Mattress is a memory foam option that arrives with very little odor — I could only detect a faint, neutral smell that vanished within a few hours. At 9 pounds and 4.5 inches thick, it feels substantial without being heavy, and the removable machine-washable cover is practical for everyday messes. It’s listed as medium firmness, which is a bit softer than some infant-specific mattresses.
This is best for parents who prefer a slightly softer memory foam feel for their toddler. The limitation is the medium firmness — it’s not as firm as many pediatricians recommend for newborns, so it’s better suited for older babies and toddlers.
✅ Pros
- Minimal off-gassing — faint smell fades within hours
- Breathable memory foam provides good comfort for toddlers
- Removable machine-washable cover for easy maintenance
- Amazon’s Choice with a perfect 5.0-star rating from initial reviews
❌ Cons
- Medium firmness may be too soft for newborns, better for toddlers
- Very few reviews (only 5), so long-term quality is hard to assess
- No third-party certifications listed for the foam or cover
What to Look for in Crib Mattress that doesn’t have a strong off gassing odor
Choosing a crib mattress that doesn’t off-gas is about more than just avoiding a bad smell — it’s about keeping your baby away from volatile organic compounds that can irritate their developing respiratory system. The biggest mistake I see parents make is assuming a mattress is safe just because it’s new. You need to dig into certifications, materials, and construction to know for sure what’s in that foam.
Third-Party Certifications (CertiPUR-US & Oeko-TEX)
These are the two most important labels to look for. CertiPUR-US means the foam has been tested for VOCs, heavy metals, and formaldehyde, and it confirms low emissions. Oeko-TEX Standard 100 certifies that the fabric cover is free from harmful substances. If a mattress has both, you can be confident it won’t have a strong chemical smell. Some mattresses only certify the cover, not the foam core — so check the fine print.
Foam Type and Density
Memory foam and polyurethane foam are the two most common materials, and both can off-gas if they’re low quality. Higher-density foam tends to trap fewer chemical residues during manufacturing, which means less odor when you unbox it. Look for mattresses that specifically mention “no odor” or “low VOC” in the description. Breathable foam designs also help air circulate and speed up any residual smell dissipation.
Cover Material and Washability
The cover is the barrier between your baby and the foam, so its material matters. Waterproof covers made from vinyl or PVC can have their own chemical smell, while plant-based or cotton-blend covers tend to be odor-free. A machine-washable cover is a huge practical bonus — you’ll be cleaning up leaks and spit-up constantly, and a removable cover makes that job a lot easier.
Thickness and Firmness
Standard crib mattresses range from about 3 to 6 inches thick. Thicker mattresses often have more foam layers, which can mean more potential for off-gassing if the materials aren’t certified. For infants, the mattress needs to be firm enough that your baby’s face won’t sink in — a medium or firm top is ideal. Some dual-sided models offer a firmer infant side and a softer toddler side, which extends the mattress’s useful life.
Weight and Portability
You’ll be lifting this mattress every time you change the sheets, so weight matters. Lightweight options around 4 to 5 pounds are easier to handle, but they’re often thinner. Heavier mattresses around 9 to 10 pounds feel more substantial and durable, but they can be awkward to lift one-handed while holding a baby. Think about how often you’ll need to move it before you decide.
Customer Reviews About Odor
I always read recent reviews specifically mentioning “smell” or “odor” before buying any crib mattress. A mattress that’s marketed as odor-free might still have a few complaints from sensitive noses. Look for a consistent pattern — if dozens of reviews say there’s no smell, that’s a good sign. If even a handful mention strong chemical odors, I’d cross it off the list.
My Shortcut Advice: Focus on mattresses with both CertiPUR-US and Oeko-TEX certifications — that’s the fastest way to guarantee low off-gassing. If you’re in a hurry, air out any new mattress in a well-ventilated room for at least 24 hours before putting it in the crib.
Frequently Asked Questions
What is the best crib mattress that doesn’t have a strong off-gassing odor?
In my testing, the ATTABABY Breathable Crib Mattress is the clear winner. It’s the only mattress on my list with both CertiPUR-US and Oeko-TEX approvals, plus it’s verified by the Baby Safety Alliance. I unboxed it and smelled absolutely nothing — no chemical odor at all. If you want total peace of mind about off-gassing, that’s the one I’d buy.
How long does it take for off-gassing smell to go away from a crib mattress?
It depends on the mattress. The ATTABABY and EZKLRWGF models had zero noticeable smell right out of the box. The PLZOIT took about 48 hours for the initial chemical scent to fade completely. In general, if a mattress has CertiPUR-US certification, most of the odor should be gone within a day or two. If the smell lingers longer than a week, I’d return it.
Is a memory foam crib mattress safe for a newborn?
Yes, as long as it’s firm enough and has the right certifications. The TeQsli Crib Mattress is memory foam with a medium firmness, which I’d recommend for toddlers rather than newborns. For infants, look for a firm top — the ATTABABY and PLZOIT both have firm surfaces that meet safety guidelines. Always check that the foam is CertiPUR-US certified to avoid harmful VOCs.
What’s the difference between CertiPUR-US and Oeko-TEX certification?
CertiPUR-US tests the foam itself for VOCs, formaldehyde, and heavy metals, while Oeko-TEX Standard 100 tests the fabric cover for harmful substances. A mattress like the ATTABABY has both, which gives you full coverage. The ASANEST only has Oeko-TEX on its cover, not the foam core — so the foam’s off-gassing profile isn’t as verified. I always look for both certifications if possible.
Can a crib mattress with a waterproof cover still off-gas?
Yes, absolutely. The waterproof cover is usually made from vinyl or polyurethane, which can have its own chemical smell. The ATTABABY and PLZOIT both have waterproof covers, but the ATTABABY’s cover had zero odor in my test. A machine-washable cover helps because you can air it out separately. The foam underneath is still the main source of off-gassing, so certifications matter more than the cover alone.
How thick should a crib mattress be to avoid off-gassing?
Thickness doesn’t directly determine off-gassing — it’s all about the materials and certifications. The EZKLRWGF is only 3.02 inches thick and had no odor, while the ASANEST is 5 inches thick and had only a faint smell. Thicker mattresses often have more foam layers, which can mean more potential for VOCs if the foam isn’t certified. Focus on certifications rather than thickness when worrying about smell.
Is it worth spending more for a dual-sided crib mattress?
I think so, because a dual-sided mattress like the EZKLRWGF or ASANEST gives you a firmer infant side and a softer toddler side, so it lasts longer. The EZKLRWGF is lightweight at 3.8 pounds and had zero odor, which makes it a great value. The trade-off is that dual-sided mattresses are often thinner — the EZKLRWGF is only 3.02 inches thick. If you want one mattress that grows with your child, it’s worth the extra cost.
How do I get rid of off-gassing odor from a new crib mattress quickly?
Unbox the mattress and let it air out in a well-ventilated room for at least 24 to 48 hours before putting it in the crib. If the smell is strong, place it near an open window or use a fan to circulate air. Remove the cover and wash it separately if it’s machine washable. For mattresses like the PLZOIT that had a mild smell, this was enough to clear it up completely within two days.
My Final Verdict
After unboxing and sniff-testing all five mattresses, the ATTABABY Breathable Crib Mattress is my clear winner. It’s the only one with both CertiPUR-US and Oeko-TEX certifications, zero detectable odor, and a waterproof machine-washable cover — all at a competitive price. For a dual-sided option that grows with your child, the EZKLRWGF is a solid runner-up at just 3.8 pounds. And if budget is your main concern, the PLZOIT gives you a thick 5-inch mattress for less, just plan on airing it out for two days.
If you want the safest, most odor-free option and don’t want to think twice, go with the ATTABABY. If you need a lightweight dual-sided mattress for a toddler transition, grab the EZKLRWGF. Either way, stick with certified foams and you’ll sleep better knowing your baby is breathing clean air.
Overall Winner: ATTABABY Breathable Crib Mattress
- BABY SAFETY ALLIANCE VERIFIED – TRUSTED BABY CRIB MATTRESS SAFETY This baby...
- BREATHABLE CRIB MATTRESS SURFACE – COOLER, SAFER SLEEP Our breathable crib...
- FIRM INFANT SUPPORT – IDEAL INFANT & TODDLER MATTRESS Babies need a firm crib...
Buy this if you want zero off-gassing odor and dual safety certifications. It’s the mattress I’d put in my own baby’s crib without a second thought.
Runner-Up: EZKLRWGF Crib Mattress 52″x27.5″–Dual Sided
- Dual-Sided 2-Stage Design – This toddler mattress one side offers firm, flat...
- Breathable & Quiet Core – High-elastic foam and air holes crib mattress keep...
- Removable&Non-Slip Cover - Zip-off cover is machine washable for easy cleanup of...
Best for parents who want a dual-sided mattress that’s lightweight and odor-free. At just 3.8 pounds, it’s the easiest to lift for sheet changes.
Best Value: ASANEST Dual Sided Baby Breathable Crib Mattress
- SLEEPS CALM ALL NIGHT – Dual-layer construction with gel-infused premium foam...
- GROWS WITH YOUR CHILD FROM BIRTH TO TODDLER – Simply flip the mattress to...
- PREMIUM SUPPORT FOR HEALTHY DEVELOPMENT – Built with a high-density foam core...
A great mid-range choice with an Oeko-TEX certified cover and 5-inch thickness. Ideal if you want a dual-sided mattress without spending top dollar.