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Sealy FlexCool 2-Stage Crib Mattress

The Sealy FlexCool 2-Stage Crib Mattress is 5.8 in thick, per Sealy Baby. A 204 coil two-sided mattress with a firmer infant side and softer toddler side, cotton cover and waterproof lining.

Made in the USA, per the maker “Proudly made in the USA of U.S. and import parts” Source

  • $129.99List price
  • 5.75 inThickness
  • InnerspringCore
  • Two-stageSides
See it on Sealy Baby's site

All two-stage crib mattresses

How the FlexCool 2-Stage (EM443) stacks up

Against the 82 two-stage crib mattresses we track. The shaded band is where the middle half of them fall; the dot is this one.

Thickness5.8 in

Within the typical range for two-stage crib mattresses (5 in to 6 in).

This one
4 inmiddle 5.5 in6 in
Price$129.9939th lowest price of 79

Within the typical range for two-stage crib mattresses ($89.99 to $189.99).

This one
$44.99middle $129.99$799

What sets the FlexCool 2-Stage (EM443) apart

Measured against the 82 two-stage crib mattresses we compare, from each maker's published specs.

Next to its closest matches

Fit check

Size, per the maker51.63 × 27.25 × 5.75 in
SidesTwo: a firmer infant side and a toddler side, per the maker

Crib types on Cribpicks that take a full-size crib mattress:

Listed features

  • 204 coils
  • Firm infant side and softer toddler side
  • Waterproof lining
  • Lifetime warranty

Where to buy the FlexCool 2-Stage (EM443)

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good to know
  • Check for recalls: Search the agency's recall list with the model number and date code from the label: CPSC recall search.
  • Safe sleep: see the AAP's guide to safe sleep and NICHD Safe to Sleep. Check the label and the maker's instructions, and ask your pediatrician about your child.

Full specs

Sealy Baby FlexCool 2-Stage (EM443)
TypeTwo-stage crib mattress
List price$129.99
Size51.6 × 27.3 × 5.8 in
Thickness5.8 in
CoreInnerspring: 204 steel coils with firm layers and cotton wrap
Coils204
Two-stageYes, infant and toddler sides
Firm for infantsYes, per the maker
WaterproofYes
Breathable designYes, per the maker
CertificationsGREENGUARD Gold
WarrantyLifetime, workmanship and materials
Made inUSA (U.S. and imported parts)

Compare the FlexCool 2-Stage (EM443) with

How each closest rival differs from the FlexCool 2-Stage (EM443), from the makers' specs.

Ask the meadow

FlexCool 2-Stage (EM443): questions answered

From Sealy Baby's published specs, last checked 2026-11-02.

Will the Sealy FlexCool 2-Stage Crib Mattress fit my crib?

The maker lists it at 51.63 × 27.25 × 5.75 in, a full-size crib mattress. Check that the mattress size matches what your crib's maker specifies. Safe sleep: see the AAP's guide to safe sleep and NICHD Safe to Sleep. Check the label and the maker's instructions, and ask your pediatrician about your child.

How does a two-stage mattress like the Sealy FlexCool 2-Stage Crib Mattress work?

One side is firmer for infants and the other is softer for toddlers. Follow the maker's instructions on when to switch sides. Safe sleep: see the AAP's guide to safe sleep and NICHD Safe to Sleep. Check the label and the maker's instructions, and ask your pediatrician about your child.

What is the Sealy FlexCool 2-Stage Crib Mattress made of?

204 steel coils with firm layers and cotton wrap, with 204 coils. The maker lists GREENGUARD Gold.

Is the Sealy FlexCool 2-Stage Crib Mattress waterproof or washable?

The maker says it has a waterproof surface or cover.

Still wondering? Write to us at hello@cribpicks.com and we'll look it up.

More two-stage crib mattresses

Where these specs come from

Last checked 2026-11-02. Spot something wrong? Tell us. Read our editorial and safety policy and corrections.