Search  for anything...

Sealy Baby Flex Cool 2 Stage Breathable Crib Mattress with Toddler Bed Fit, Waterproof & Airy Cotton Cover, 204 Premium Coils, GREENGUARD Gold Certified, Safety & Quality Tested, Made in USA, 52x28"

  • Based on 2,598 reviews
Condition: New
Checking for the best price...
$129.97 Why this price?
Save $1,669.03 was $1,799.00

Buy Now, Pay Later


As low as $21.66 / mo
  • – 6-month term
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, PayTomorrow, Affirm, Afterpay, Apple Pay, and PayPal. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

FREE 90-day refund/replacement

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.


Availability: In Stock.
Fulfilled by Amazon

Arrives Friday, Sep 19
Order within 8 hours and 13 minutes
Available payment plans shown during checkout

Style: Flex Cool


Features

  • Natural & Cooling Breathable Crib Mattress - Cotton surface and airflow pocket offers breathability on baby's gentle skin. PVC-free waterproof barrier protects crib and mattress from leaky messes. Soft fabric is quiet and contains no harmful chemicals
  • Sealy Crib Mattress 2 Stage Design - Grow with me baby crib mattress design offers a firmer infant side ideal for newborns and a cozier side to fit full size toddler mattress. Measures 52x28" to snugly fit in babys standard full size crib and toddler bed
  • GREENGUARD GOLD Certified & Non Toxic - GREENGUARD GOLD Air Quality Certified, contains no harmful chemicals. Coil mattresses are tested to more standards than foam ones, passing ASTM safety standards
  • Durable Infant Crib Mattress - American steel coils flex to adjust to baby's body to provide superior posture support. Sustainable & natural cotton comfort padding. Steel edges plus corner/side strength pillars maintain firmness as baby grows.
  • Trusted American Quality - Proudly made in the USA, safety tested and quality controlled materials crafted in one location by expert crib mattress team. Sealy is America's Most Trusted mattress brand.
  • Pair with Sealy Crib Mattress Protector - For the perfect pair, complete your Sealy toddler bed mattress with a coordinating Sealy Crib Mattress Pad (available in 1-pack and 2-pack options)

Description

A premier choice for both natural comfort and lasting durability, the Sealy FlexCool 2-Stage Baby Mattress and Toddler Mattress is the best crib mattress, breathable and airy for your infant or toddler. A natural cotton cover offers breathability on baby's skin plus an airflow pocket allows baby's mattress to breathe. Several layers of natural cotton and sustainable cushioning wrap around the most premium 204 spring core that flex under baby's movement. American-made coils are interwoven and heat-tempered to offer babies and toddlers flexible support that adapts to movement, offering support where they need it most. Steel edge frame and strength pillars create the ultra-firm sides just like an adult mattress. PVC-free waterproof crib mattress protects against leaky messes. The top cover remains breathable and quiet. Sealy Baby crib mattress materials all pass the strictest chemical and air quality tests including flammability and federal durability and impact testing. Coil mattresses pass more ASTM crib mattress standards than foam crib mattresses. Greenguard Gold Certified for air quality and a healthier indoor environment for babies. Rest easy knowing your baby's mattress is firm, durable, waterproof and tested to be safe from harsh chemicals. Families choose Sealy Baby crib mattresses for the safest, most supportive and comfortable crib mattresses for their little ones. Passes Children's Safe Products Act and does not contain phthalates, lead, latex, or harsh VOCs. Measuring almost 52x28x5.5 inches, its a standard crib mattress size offering a snug fit in baby's crib or toddler beds. Lightweight to easily change crib sheets. Sealy is America's Most Trusted mattress brand. Highly rated breathable baby crib mattresses help your baby sleep peacefully and you can sleep better knowing Sealy has supported infants and toddlers for decades Sealy kids mattress are made in the USA and are a perfect addition to all baby registry must haves lists! From the Manufacturer Sealy Baby offers the most trusted crib mattresses and offers safe, supportive, and comfortable toddler bed mattresses, bedside baby bassinets and protective premium crib bedding that parents have depended on for decades. As the leader in safe sleep, comfort, and lasting quality for years, more babies sleep on a Sealy than any other brand in the USA. Sealy Baby crib mattresses are firmness tested to help reduce the risk of suffocation and provide a supportive sleeping surface. In addition, 100% of Sealy Baby crib mattresses are American made by experts who help create industry standards to ensure safety and quality for infants and toddlers. Every baby mattress is Non-Toxic, ASTM Certified, CPSIA Certified and Greenguard Gold Air Quality Certified for a healthier sleeping environment, tested for low chemical emissions, and are made without harsh chemicals for a safer sleep. Sealy Baby's collection of breathable bassinets, bedside sleepers, comfortable diaper changing pads and top-rated, hypoallergenic protective crib mattress pads and encasements are nursery essentials and baby registry must haves that every new parent desires for their newborn. Parents rest easier with a trusted brand, quality products and customer care that is always here to help your family sleep better.

Brand: SEALY BABY


Size: Crib


Product Dimensions: 52"L x 28"W x 5.75"Th


Top Style: Tight Top


Cover Material: Cotton


Number of Layers: 4


Fill Material: Innerspring Coils


Weight Limit: 60 Pounds


Special Feature: Breathable, Double Sided, Durable, GREENGUARD GOLD Certified, Hypoallergenic, Made in USA, Water Resistant See more


Color: White


Product Dimensions: 52 x 28 x 5.75 inches


Item Weight: 14.9 pounds


Department: unisex-baby


Manufacturer: Kolcraft


Item model number: EM443-STS1


Thickness: 5.75 Inches


Volume: 238.4 Fluid Ounces


Refill: Innerspring Coils


Form Factor: USA standard crib or toddler mattress


Care instructions: Hand Wash Only


Warranty Description: Limited lifetime warranty on workmanship & materials.


Batteries required: No


Included Components: Crib Mattress


Import: Made in US


Age Range Description: Baby, Toddler


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Friday, Sep 19

Yes, absolutely! You may return this product for a full refund within 90 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • Worth every penny!
Style: Flex Cool
Fantastic crib mattress. It feels so comfortable and I notice that my son sleeps much better on it than his old one.
Reviewed in the United States on August 21, 2025 by Rachel M.

  • Great mattress for toddler bed, soft and comfortable and good price point
Style: Flex Cool
I bought this mattress for when my child transitioned into her first toddler bed. it fit perfectly and was very comfortable. It also was a great price point and quality was great.
Reviewed in the United States on June 5, 2025 by Lauren Witt

  • Quality
Style: Flex Cool
This is a good mattress. My one son who 2.5 has used this mattress since day one and it is still supportive and shows no wear on it. I actually repurchased this for my 3 year old, for his bed and he loves it. In 2.5 years it has not sunk in the middle like the other purchases for my 3 year old. Definitely worth the money. ... show more
Reviewed in the United States on June 14, 2025 by Angela and Bill

  • Great mattress
Style: Flex Cool
Baby loves this mattress!! Good quality and thick. Bought biloban sheets on Amazon. Nice colors and soft.
Reviewed in the United States on April 23, 2025 by lIrizarry1nyc

  • Not as waterproof as I thought it would be
Style: Flex Cool
I thought this mattress was good value for the money we needed a good mattress quick for our toddler and it is a good cheaper option. It was labeled to be waterproof but the material soaks ip liquids and leaves stains from said liquids even with a mattress cover which bummed me out. I pull have preferred a material of the mattress to be something you could wipe with disinfectant wipes. It was easy to set up but I don't agree with it being waterproof. ... show more
Reviewed in the United States on May 28, 2025 by Courtney Rakovitis

  • Safe and comfortable!
Style: Flex Cool
Great mattress and very comfortable for our baby and safe! Great value for the money! Light weight and easy to change the sheet on!
Reviewed in the United States on January 24, 2025 by Payton Morgan

  • Great mattress
Style: Flex Cool
Sealy brand is excellent, love the mattress! Baby & toddler approved
Reviewed in the United States on April 27, 2025 by Shar

  • Impressed with comfort
Style: Flex Cool
Using this cool matress in fl with a toddler bed. Child sleeps really well on it, and even mom likes it and says it's very comfortable when it's snuggle time right before bedtime. 5 star purchase for us, worth the Xtra money to go with this mattress.
Reviewed in the United States on May 15, 2025 by chris w

Can't find a product?

Find it on Amazon first, then paste the link below.
Checking for best price...