

🌟 Sleep smart, grow strong — the crib mattress that evolves with your baby!
The Sealy Baby Flex Cool 2-Stage Crib Mattress combines 204 premium steel coils with a breathable cotton cover and a PVC-free waterproof barrier to deliver superior support, cooling comfort, and leak protection. Designed to grow from infant to toddler with dual firmness sides, it meets rigorous GREENGUARD Gold and ASTM safety standards. Proudly made in the USA, this mattress offers durable construction with steel edges and corner pillars, ensuring a safe, non-toxic, and restful sleep environment for your little one.






| ASIN | B074N6BQL3 |
| Age Range Description | Baby, Toddler |
| Assembly required | No |
| Batteries required | No |
| Best Sellers Rank | #2,901 in Baby ( See Top 100 in Baby ) #10 in Crib Mattresses |
| Care instructions | Hand Wash Only |
| Customer Reviews | 4.6 4.6 out of 5 stars (2,983) |
| Department | unisex-baby |
| Form Factor | USA standard crib or toddler mattress |
| Import | Made in US |
| Included Components | Crib Mattress |
| Item Weight | 7.73 pounds |
| Item model number | EM443-STS1 |
| Manufacturer | Kolcraft |
| Product Dimensions | 27.25 x 5.75 x 51.63 inches |
| Refill | Innerspring Coils |
| Thickness | 5.75 Inches |
| Volume | 238.4 Fluid Ounces |
| Warranty Description | Limited lifetime warranty on workmanship & materials. |
D**N
Great baby gift
This is a very good mattress and fit perfectly in the baby bed.
S**Y
Great investment for quality baby sleep
Highly recommend this crib mattress! Comfortable for little one, breathable, and easy to change sheets on. It’s got a decent weight to it, so I feel assured my little one will have good support. No shrinkage with daily use so far.
A**R
Love!
Great mattress! Fits perfectly into our crib, no sinking or noise! Both babies have this mattress in their cribs!
J**Z
Also good for cats
Added the crib sheets and before we could put it in the crib, it was already being tested. The baby also loved it. It’s firm but soft and thick. Seems like good quality thus far.
C**S
Not as waterproof as I thought it would be
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.
R**.
Worth every penny!
Fantastic crib mattress. It feels so comfortable and I notice that my son sleeps much better on it than his old one.
S**R
Crib mattress
I bought this for my grandsons crib. It fit very well and was soft enough. Very light weight.
C**W
Impressed with comfort
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.
Trustpilot
1 week ago
1 month ago