Sealy Baby Flex Cool 2-Stage Crib Mattress
- 204 pocketed coils, 4 layers
- Dual firmness, double sided 2 stage design
- Waterproof cotton surface, GREENGUARD Gold
- 14.9 pounds, 60 lb weight capacity
- Limited lifetime warranty, made in USA
Last refreshed Sep 11, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A pocketed coil crib and toddler mattress with a cotton surface and two firmness stages. The care instructions call for hand washing only.
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ASIN: B074N6BQL3Category: Nursery Cribs, Beds & Mattresses
Overview
Heat-tempered interwoven pocketed coils support the mattress, with layers of cotton cushioning above them and a steel edge frame. The cover is cotton with a built-in airflow pocket for ventilation.
The reason to buy is a ventilated coil design that serves from newborn to toddler by flipping to a softer side. The limit is care, with hand washing only, and a modest toddler weight rating.
Who it's for
Parents setting up a standard crib will use the firm infant stage first and the softer stage later. Families planning a larger bed soon should plan another mattress.
Pros and cons
- Pocketed coil support
- Breathable cotton surface
- Dual firmness design
- Hand wash only
- Weight rating for small children
- Crib size only
Performance notes
Pocketed coils flex independently under a baby's movement, and cotton layers lie above them. The airflow pocket and cotton cover are meant to vent heat, and the waterproof surface blocks spills.
Specifications
| Brand | SEALY BABY |
|---|---|
| Dimensions & fit | |
| Item dimensions | 52 L x 28 W x 5.75 Th inches |
| Weight | 14.9 pounds |
| Weight capacity | 60 pounds |
| Construction & materials | |
| Color | White |
| Cover Material | Cotton |
| Warranty & support | |
| Manufacturer Warranty Description | Limited lifetime warranty on workmanship and materials |
| Other details | |
| Item Thickness | 5.75 inches |
| Item Firmness Description | Firm |
| Number of Layers | 4 |
| Number of coils | 204 |
| Product Care Instructions | Hand Wash Only |
| Coil type | Pocketed Coil |
Closest rivals on specs
Newton Baby Breathable Crib Mattress and Toddler Bed- Item Weight 14.9 vs 11 pounds (+35%)
Dream On Me Twilight 2-in-1 Spring Coil Crib Mattress- Item Thickness 5.7 vs 5 inches (+14%)
- Item Weight 14.9 vs 11.5 pounds (+30%)
- Item Depth 5.7 vs 5 inches (+14%)
Moonlight Slumber Little Dreamer Dual-Sided Crib Mattress- Item Thickness 5.7 vs 5 inches (+14%)
- Item Weight 14.9 vs 10.8 pounds (+38%)
- Item Depth 5.7 vs 5 inches (+14%)
Frequently asked questions
What size is the Sealy Baby Flex Cool mattress?
The title says standard 52 by 28, and the specs list 52 inches long, 28 wide and 5.75 thick. The model name gives 51.7 by 27.3, so allow for a small difference.
Can I wash the Sealy Baby cover?
The care line says hand wash only.
Is it a twin bed mattress?
No. It is a crib and toddler mattress, mattress only.