Quick answer: Sealy Baby crib mattresses are built for growing babies because of their 2-stage design: a firmer infant side for the firm, flat surface newborns need, and a softer toddler side for comfort as your child grows. One mattress fits standard cribs and toddler beds, so it can carry your child from the first night home into the toddler years.
Key takeaways
- A 2-stage crib mattress has a firm infant side and a softer toddler side. You flip it as your child grows.
- Babies need a firm, flat sleep surface. Sealy Baby crib mattresses meet ASTM crib mattress standards, which include firmness testing.
- Sealy Baby 2-stage mattresses fit standard-size cribs and toddler beds, so one mattress can last for years.
- Waterproof barriers, breathable cotton covers and GREENGUARD Gold certification help them hold up to everyday life.
Your baby will change more in the first few years than at any other time in their life. They’ll go from a newborn who barely moves to a toddler who rolls, climbs and bounces. Their crib mattress needs to keep up.
That’s the thinking behind every Sealy Baby crib mattress. Here’s how the 2-stage design works, what makes it safe for infants and comfortable for toddlers, and how to choose the right one for your family.
What is a 2-stage crib mattress?
A 2-stage crib mattress is a dual-sided mattress with two firmness levels. One side is firmer for infants, and the other is softer for toddlers. When your child is ready, you simply flip the mattress over instead of buying a new one.
Most Sealy Baby crib mattresses use this grow-with-me design. The infant side gives newborns firm, even support, while the toddler side adds cushioning, like memory foam or airy comfort layers, for older children who move around more at night.
Why do babies need a firm crib mattress?
The American Academy of Pediatrics recommends placing babies on their backs on a firm, flat sleep surface, with no soft bedding in the crib. A firm mattress keeps baby’s sleep surface even and supportive.
That’s why the infant side of every Sealy Baby 2-stage mattress is the firmer side. Sealy Baby crib mattresses also meet ASTM crib mattress standards, which went into effect in August 2022 and include testing for durability, compression, firmness and proper fit inside standard-size cribs.
What changes when your baby becomes a toddler?
Toddlers sleep differently than newborns. They toss, turn, sprawl and sometimes jump. The toddler side of a Sealy Baby 2-stage mattress adds a softer layer of comfort while still offering support for growing bodies.
Many Sealy Baby mattresses also include features made for active toddlers:
- Reinforced edges. Coil models include steel border rods and EverEdge corner and side protectors to keep the edges firm.
- Extra head and foot support. The Posturepedic Grace adds targeted support zones on the toddler side.
- Toddler bed fit. Sealy Baby crib mattresses fit USA standard-size cribs and toddler beds, so the same mattress can move with your child when they leave the crib.
When should I flip a 2-stage crib mattress to the toddler side?
Keep your baby on the firmer infant side through their first year, since the AAP’s safe sleep recommendations apply to babies up to 1 year old. Many families flip to the toddler side after their child’s first birthday or when they move to a toddler bed. Check your mattress label to confirm which side is which, and follow the manufacturer’s instructions.
There’s no rush to flip. Toddlers can keep sleeping on the firmer side for as long as they’re comfortable.
What else makes Sealy Baby crib mattresses built to last?
- Waterproof protection. A waterproof barrier helps keep liquids from seeping inside and helps prevent odors, mold and mildew.
- Breathable cotton covers. Soft, PVC-free cotton covers are gentle on baby’s skin.
- GREENGUARD Gold certification. Sealy Baby crib mattresses are tested at an independent laboratory for harmful chemical emissions, a stricter standard designed for children’s products.
- Chemical safety testing. They pass CPSIA testing for lead and phthalates and meet Chemicals of High Concern to Children regulations. Foam models use CertiPUR-US Certified foam.
- Lifetime warranty. Many models, including the OptiCool and FlexCool, carry a lifetime warranty on workmanship and materials.
Which Sealy Baby 2-stage crib mattress is right for my family?
All three of these Sealy Baby favorites have a firmer infant side and a softer toddler side. The biggest difference is what’s inside.
| Mattress | Best for | Infant side | Toddler side |
|---|---|---|---|
| Sealy OptiCool 2-Stage Crib Mattress | Lightweight foam and easy sheet changes | Firm, lightweight hypoallergenic core | Cooling memory foam topper |
| Sealy FlexCool 2-Stage Crib Mattress | Classic coil support | 204 durability-tested steel coils for firm support | Airy cushioning that contours to your child’s body |
| Sealy Baby Posturepedic Grace 2-Stage Hybrid | Targeted, zoned support | Ultra-firm ortho-support pad in the center, where babies are laid down | Soybean memory foam with extra head and foot support |
- OptiCool: Weighs 11.88 lbs for easy lifting, with a breathable cotton cover and waterproof barrier.
- FlexCool: Includes 6 EverEdge corner and side protectors and heavy-gauge steel border rods, and is made in the USA of U.S. and imported parts.
- Posturepedic Grace: Combines 204 steel coils with memory foam in a hybrid design, with a steel support frame and 10 EverEdge guards.
The bottom line
A Sealy Baby crib mattress is designed to grow with your child: firm where newborns need it, cozier where toddlers want it, and built to fit both cribs and toddler beds. Choosing a 2-stage mattress means one well-made mattress can carry your child from their first night home through the toddler years.
Explore the full collection of Sealy Baby crib mattresses, and check our crib mattress fit guide to make sure your mattress fits your crib snugly.
Frequently asked questions
What is the difference between the infant side and the toddler side of a crib mattress?
The infant side is firmer to give newborns the firm, flat sleep surface safe sleep experts recommend. The toddler side is softer, with added cushioning like memory foam or airy comfort layers, for older children who move more at night. You flip the mattress when your child is ready.
When should I switch my crib mattress to the toddler side?
Keep your baby on the firmer infant side through at least their first year. Many families flip to the toddler side after the first birthday or when moving to a toddler bed. Check your mattress label to confirm which side is which, and follow the manufacturer’s instructions.
Can my toddler keep sleeping on the infant side?
Yes. There’s no need to flip the mattress on a set date. The firmer infant side is still supportive for toddlers, so you can switch whenever your child seems ready for a softer, cozier surface, or keep using the infant side if they’re sleeping well.
Does a Sealy Baby crib mattress fit a toddler bed?
Yes. Sealy Baby full-size crib mattresses are designed to fit USA standard-size cribs and toddler beds. That means the same mattress can move with your child when they transition out of the crib, without buying a new mattress.
Is a 2-stage crib mattress worth it?
For most families, yes. A 2-stage crib mattress gives newborns a firm infant side and toddlers a softer, more comfortable side in one mattress. Because it fits both cribs and toddler beds, it can be used for several years instead of being replaced when your baby grows.
Sources
- American Academy of Pediatrics (HealthyChildren.org): How to Keep Your Sleeping Baby Safe
- Sealy Baby: Safety Testing
- Federal Register: Safety Standard for Crib Mattresses
Safety note: Always place babies on their back to sleep on a firm, flat surface with nothing else in the crib, and follow your mattress’s instructions and labels.
