SEALY BABY
Sealy Baby Posture Perfect 2-Stage Breathable Crib & Toddler Mattress, 52 x 28 in - Dual-firmness, Waterproof Cover, Greenguard Gold
Sealy Posture Perfect 2-Stage Hybrid Crib Mattress is a dual-stage crib and toddler mattress that provides a firm infant side and a softer toddler side for stage-specific sleep support in standard cribs and toddler beds. It combines a posture-supportive innerspring core (150 American-made steel coils) with a soybean memory foam topper, breathable cotton wrap, a pearl-embossed waterproof cover with lock-stitched seams (wipes clean), and breathable/hypoallergenic layers; dimensions 51.63 x 27.25 x 5.75 inches, weight 14.6 lb, GREENGUARD Gold certified, made in the USA, lifetime warranty on workmanship and materials.
- Material
- Hybrid memory foam with 150 premium coils; cotton wrap
- Category
- Baby & Toddler
Size
- GTIN
031878263600- MPN
SEALYBABY-031878263600-NEWOVERSTOCK
Specifications
Dual-stage breathable crib and toddler mattress (52 x 28 inches) with a firm infant side and softer toddler side, waterproof cover, cotton-wrapped comfort layers, GREENGUARD Gold certification, and made in the USA.
Dual-stage firmness (firm infant side; softer toddler side); multiple comfort layers with a cotton wrap for balanced support; breathable, hypoallergenic surface to promote airflow and reduce irritation; waterproof cover with lock-stitched seams that wipes clean with a damp cloth; standard crib/toddler bed sizing; low-emission materials (GREENGUARD Gold certified).
- Material
- Hybrid memory foam with 150 premium coils; cotton wrap
- Secondary
- metal, cotton
- Gender
- unisex
- Age Group
- infant
- Condition
- new
- Dimensions
- 51.63x27.25x5.75 in
- Category
- Baby & Toddler
Additional Attributes
- Brand new, open box item - box may have some damage or may not ship in original box
- Dual-stage firmness design (firm infant side, softer toddler side)
- Grow-with-me mattress
- Supportive & durable comfort layers
- Multiple comfort layers with a cotton wrap
- Balanced support and long-lasting performance
- Waterproof cover with lock-stitched seams
- Wipes clean quickly with a damp cloth
- Breathable and hypoallergenic sleep surface
- Designed to promote airflow and reduce irritation
- Standard crib and toddler bed fit
- Low-emission materials
- GREENGUARD Gold certified
- Made in the USA
- Safety-tested materials
Image Analysis
6 images- 01high
A Sealy "Posture Perfect" infant & toddler crib mattress standing upright on a white background. The mattress has a light gray/beige cover and a product label near the top showing the Sealy logo, product name, a photo of a baby lying on the mattress, a feature/spec list, and an illustration of the mattress cross-section. A green UL GREENGUARD certification badge is shown near the bottom right of the mattress.
OCR: Sealy POSTURE PERFECT Infant & toddler crib mattress 2-STAGE HYBRID with Coils, Soy Memory Foam and Cotton Covering (Feature/spec list text — small and not fully legible) AMERICA'S #1 CRIB MATTRESS BRAND GREENGUARD (UL logo) (GREENGUARD certification badge text — small/partially legible)crib mattressmattress standing uprightproduct label attached to mattressSealy logoPOSTURE PERFECT product nameinfant/toddler photo on label (baby lying on mattress)product feature list/table on labelillustration of mattress cross-sectionUL GREENGUARD certification badge (green)fabric coverrounded mattress cornerswhite backgroundproduct shadow on surfaceshrink-wrap/packaging sheen- 02high
Product image of a white rectangular crib/toddler mattress shown at an angle with measurement arrows indicating dimensions 52" (length) and 28" (width). The mattress sits against a mint green background with a navy blue lower banner containing a crib icon and the text: "Snug fit in all standard full size cribs and toddler beds." The image has a white frame and a subtle drop shadow beneath the mattress.
OCR: 52" x 28" Snug fit in all standard full size cribs and toddler beds 52" 28"white rectangular crib/toddler mattressmeasurement arrows indicating length and widthdimension labels: 52" and 28"crib icon with "52" x 28" textnavy blue information bannermint green background (upper area)white border/frame around imageproduct drop shadowstitched seam around mattress edgerounded mattress cornerssmall white icon of a crib in the bannerwhite promotional text in banner- 03high
A stylized cross-section illustration of a mattress showing layered construction (soy foam, sustainable fibers, cotton comfort layer, and an innerspring coil unit). The image includes labeled callouts, a header reading 'Hospital-Grade Protective Cover', and the Sealy logo on a light teal gradient background.
OCR: Hospital-Grade Protective Cover Soy Foam and Sustainable Fibers Comfort & Support with Cotton Sealymattress cross-section illustrationtop mattress cover (outer fabric)soy foam layer (green panel)sustainable fibers layer (beige/tan panel)cotton comfort/support layer (white layer)innerspring coil unit (dark circular coils)blue edge/border foam around coilsannotation lines/pointers linking text to layersheader text: 'Hospital-Grade Protective Cover'callout text: 'Soy Foam and Sustainable Fibers'callout text: 'Comfort & Support with Cotton'Sealy logo (lower-left)light teal/seafoam gradient backgroundyellow underline/accent under header- 04high
Product-style image showing a rectangular white mattress or mattress topper centered on a pale teal gradient background. Three large teal circular arrows surround the mattress to indicate airflow. Blue headline text above reads 'Breathable Airflow Pocket Allows Mattress to Breathe.'
OCR: Breathable Airflow Pocket Allows Mattress to Breatherectangular mattress or mattress topperwhite mattress coverseamed edge/piping on mattresslarge circular arrows (airflow graphic)arrowheads (three, forming a circle)shadow under mattressgradient backgroundpromotional text at topclean product studio shot / product rendering- 05high
A sleeping baby lies on a white crib mattress wearing a light-blue onesie. A turquoise banner in the top-right reads a promotional slogan referencing Sealy. A row of certification and award badges (Sealy logo, #1 crib mattress medallion, CPSIA/CPSC compliance, Made in USA, ASTM, CertiPUR-US, GREENGUARD Gold, etc.) is displayed along the bottom.
OCR: More babies sleep on a Sealy. Sealy #1 Crib Mattress Brand in USA Complies with CPSIA & CPSC Standards Made in USA 100% QUALITY Winner #1 MOST TRUSTED ASTM International Member CertiPUR-US GREENGUARD GOLDsleeping baby/infant (lying on side)white crib/mattress surfacelight blue baby onesiecream/beige vertical paneled background (headboard or wall)turquoise promotional banner (top right)script Sealy logo (in turquoise banner and bottom left)row of circular certification/award icons across the bottomgold medallion badge (#1 Crib Mattress Brand in USA)green circular compliance badge (CPSIA & CPSC)Made in USA circular badge with American flaglaurel/award badge with word 'Winner'black/white '#1 MOST TRUSTED' badgecircular safety/eco badge with wave/leaf graphicASTM International Member logoCertiPUR-US certification badgeGREENGUARD Gold certification badgesmall decorative shadowing on mattress- 06high
Close-up product-style image of a white quilted mattress protector with water droplets beading on its surface, indicating waterproofing. A blue banner at the bottom contains two icons and text stating the product is "100% WATERPROOF" and that an airflow pocket helps keep a baby's mattress fresh. A thin white border frames the image and a mint-green triangular background is visible at the top-right.
OCR: 100% WATERPROOF surface keeps liquids out and an airflow pocket helps keep baby's mattress fresh.white mattress protector or mattress surfacebeads of water / water droplets on surfacetextured decorative circular/floral quilted pattern on mattress coverblue information banner at bottomtwo icons in the blue banner (water droplet icon and airflow icon)informational/marketing text in blue bannerthin white frame/border around the imagemint green / teal triangular background area at top rightseam or folded edge of the mattress cover near the topsubtle shadows and highlights on droplets
Brand PDP Lookup
- Brand
- SEALY BABY
Sealy Posture Perfect 2-Stage Hybrid Crib Mattress
Documents & Data
Customer Reviews
50 reviews · out of 5
Exactly what I needed
Found the exact baby item I needed for half the cost.
Fast and efficient
Got my item fast and it was in excellent shape.
My item shipped very quickly and I…
My item shipped very quickly and I received it about 3 days after I ordered it! It came in an extra protected box as well! Very pleased with my purchase!
The best prices going and shipping is…
The best prices going and shipping is fast.
Perfect
Everything arrived exactly as expected.
Looks unused
Couldn’t even tell the stroller had been returned.
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Was just as described. Quick shipping and communication.
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I’ve ordered a few items from Kidsy now and all have been great.
Bouncer worked fine
Bouncer worked fine. Was a little worried when it showed up but it was perfectly fine!
Was pleased with the car seat I bought…
Was pleased with the car seat I bought from Kidsy. It was in the condition they described and arrived quickly. Thank you!
Great deals, easy to use site
Great deals, easy to use site
less money less hassle
Found an item still in its original packaging for 2/3 of the original pricing.
Just like described
Item matched the listing perfectly.
Good prices and fast shipping
Good prices and fast shipping
Great service
I’m so happy with my experience. Kidsy shipped my order quickly and it was in great condition.
Would recommend
Already told two friends about Kidsy.
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Love my stroller. Great deal and great service.
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Very happy
Really happy with my order. Shipped fast and clean.
Holly
Stocked my home for visits from the grandkids.
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Smooth from checkout to delivery.
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Thank you! Great prices and great items.
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I purchased a glider. It was described accurately, shipping was fast and price was great!
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Quick delivery and items in great condition!
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Found what I needed at a price I could afford.
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The products were very good
The products were very good. More than I’d expected them to be. The color of the diaper bag is beautiful and I know my daughter in love will be happy with it.
Kidsy Customer Service Review
Kidsy had a great selection of deeply discounted baby gates. Unfortunately, there was a piece missing when I received my package. I didn't realize it until after the 14 day return/exchange window. But I reached out, and they were willing to send me the piece anyway at no extra charge. I really appreciated the customer service.
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Great price and fast delivery.
Great price and fast delivery.
Stroller came super fast and I love it
Stroller came super fast and I love it
Amazing value
Saved a ton on a big item. Thank you, Kidsy!
Fast delivery
Order arrived in 2 days and looked perfect.
Highly recommend
A friend told me about Kidsy and I’ve already ordered twice.
Great, trustworthy experience
Great deals, easy checkout with lots of payment options, shipped very quickly, and everything was packed well and looked exactly as it was described! I didn't end up needing any intervention with my shipping experience but appreciate the option to cover lost packages for a minimal fee, especially as we get into the late and lost package holiday season. I'll definitely be getting more of my baby gear from Kidsy.
Item was like new
Bought a swing and it looked untouched. So happy.
Kidsy had exactly the baby/pet gates we…
Kidsy had exactly the baby/pet gates we needed...good price...good shipping...good items. If you have children or know someone who has children...this site is a keeper! They get 10 stars!!
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Would buy again
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Better than expected
Everything came packaged well, looked brand new. Super impressed.
Good experience
Item arrived just as described. Couldn’t be happier.
Quick response
Ordered a gate prior to this one, UPS lost it on route. I reached out to Kidsy via email and they secured a refund from UPS. Was hesitant to order again, but I couldn't find the gate at a more reasonable price. 2nd order arrived with no issues. Gate is sturdy and the dog (Husky) hasn't gotten through it (he's an escape artist). Quick delivery from start to finish.
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I appreciated the detailed description
I appreciated the detailed description, I knew I was getting a floor model and it came in perfect shape at a much reduced cost. When I thought the cupholders weren't included, I reached out to them and then we found them and they were very responsive and thankful that I let them know. Everything is fine.
Looks like new
Couldn’t believe how good the condition was.
Q&A
9 answered9 Questions Answered
6 high confidence · 5 web-sourced
The listing shows dimensions 51.63 x 27.25 x 5.75 in — will this mattress reliably fit standard full-size cribs and toddler beds and allow placement at a newborn's lowest mattress setting in most convertible cribs?
Yes. This Sealy Baby Posture Perfect measures 51.63 x 27.25 x 5.75 inches (standard full‑size crib size) and is designed to fit standard cribs and toddler beds securely. At 5.75 inches thick—under the commonly used 6‑inch maximum thickness—this mattress will allow placement at the newborn lowest mattress setting in most convertible cribs, though you should verify your crib’s published mattress dimensions/lowest‑position clearance before installing.
product_dimensions; product_features (standard crib fit, dual‑stage design, 5.75" thickness)
Is the pearl-embossed waterproof cover fully removable (zip-off) and machine-washable, or is it only spot-clean/wipeable?
This cover is not zip-off or machine-washable — the pearl-embossed waterproof cover has lock-stitched seams and is designed to be wiped clean with a damp cloth only.
product_description / product_features (pearl-embossed waterproof cover with lock-stitched seams; wipes clean)
What is the construction of the 150-coil support core — are the coils individually pocketed or a continuous/bonnell innerspring, and what is the coil gauge?
This Sealy Baby Posture Perfect uses a 150‑coil Bonnell (connected/hourglass) innerspring — it is not an individually pocketed (wrapped) coil system. Sealy’s product page and the mattress law label list the 150‑coil innerspring but do not publish a coil gauge, so we cannot confirm the wire thickness. [1][2][3]
Sources
- [1]Target product listing — Sealy Posture Perfect 2-Stage Crib and Toddler Mattress (lists coil type: Bonnell Coils).
- [2]Sealy Baby product page — Sealy Posture Perfect (describes 150 American-made steel coil system / innerspring core).
- [3]Product law label image (lists 'innerspring unit' among filling materials).
![[3]Product law label image (lists 'innerspring unit' among filling materials).](https://sealybaby.com/wp-content/uploads/sites/4/2025/01/EM375-WPL.jpg){kind=link}
Sealy product page (features/specs) and Target product listing (coil type), plus product law label image.
How thick is the soybean memory foam topper on each side, and are there published firmness ratings (e.g., ILD) for the infant (firm) and toddler (softer) sides?
We don’t publish a separate thickness for the soybean memory foam topper or ILD (firmness) ratings for the infant and toddler sides; the overall mattress thickness is 5.75 inches. The Sealy product page and the mattress law label list a soy‑enhanced memory/polyurethane foam layer (polyurethane foam shown as ~15% of filling) but do not include topper thickness or ILD values. [1][2]
Sources
brand product page & product law label (Sealy Posture Perfect EM375 product page; EM375 WPL image).
Does the mattress meet required flammability standards without the use of added chemical flame retardants (e.g., PBDEs, TDCPP, TCEP), or does it contain any added flame-retardant chemicals?
We do not add chemical flame retardants to this mattress. The soybean memory-foam topper is CertiPUR‑US certified and “does not contain harsh chemicals or flame retardants,” and the mattress is GREENGUARD Gold certified and listed as meeting children’s chemical-safety regulations (CPSIA and state Chemicals of High Concern rules), indicating no added PBDEs, TDCPP, TCEP, or similar flame‑retardant chemicals. [1] [2]
Sources
brand product page (features & safety) and product law label image
Is the GREENGUARD Gold certification applicable to the complete finished mattress (including cover and adhesives) or only to specific internal components?
We confirm the GREENGUARD Gold claim covers the finished crib mattress and its components (cover, foams, adhesives), not just individual internal parts. Sealy’s safety & certifications page explicitly says the entire crib mattress and its components have been tested and approved for low chemical emissions. [1].
Sources
awards & certifications
Is the waterproof cover and other surface materials free from PFAS/PFOA and PVC, or otherwise tested for presence of those chemicals?
We do not have a specific PFAS/PFOA test result listed for the Posture Perfect mattress cover. Sealy states its crib mattresses are GREENGUARD Gold certified and that its Sealy Baby fabrics are PVC‑free, but the product page does not explicitly claim “PFAS‑free.” Independent testing by EWG has detected measurable PFAS in some Sealy waterproof crib/mattress pad covers, so we cannot confirm this mattress’s cover is PFAS/PFOA‑free without a specific test of this exact cover. [1][2][3]
Sources
Sealy Baby FAQ and product page; EWG PFAS testing appendix (independent lab results)
Should buyers expect any noticeable off-gassing odor on unpacking, and if so, how long does any initial smell typically persist?
You should not expect a strong chemical off‑gassing odor — this mattress is made with low‑emission materials (GREENGUARD Gold) and a soybean memory foam topper, so any scent is usually very mild. If you do notice a faint “new mattress” smell, it typically dissipates within about 24–72 hours when left in a well‑ventilated room; unpacking and allowing the mattress to air for a day or two speeds this up.
product_description (GREENGUARD Gold, soybean memory foam) plus category expertise on typical off‑gassing duration
Is there a recommended maximum child weight or age at which you advise switching from the softer toddler side to a standard toddler bed mattress?
We don’t publish a specific age or weight limit for this mattress; instead, switch when your child begins climbing out or when the crib rail is at or below their chest — generally around 35 inches (≈89 cm), which commonly happens between about 18 months and 3½ years. Mattresses themselves typically have no strict per-child weight limit, but toddler bed frames or toddler beds often are rated (commonly around 50 lb), so check the bed/frame manufacturer’s guidance when you move to a toddler bed. [1][2][3][4]
Sources
Sleep Foundation guidance on crib-to-bed timing; Nationwide Children's transition guidance; CPSC/ASTM toddler-bed guidance (50 lb); mattress weight guidance from manufacturer help center (Avocado).