Sealy Serene Duo-Sleek 2-Stage Crib Mattress
The Sealy Serene Duo-Sleek 2-Stage Crib Mattress weighs 7.8 lb and is 5.8 in thick, per Sealy Baby (Kolcraft). An under-8-lb two-stage mattress with a springless poly-core, a firmer infant side and a reinforced waterproof cover.
- $69.99List price
- 5.75 inThickness
- 7.8 lbWeight
- PolymerCore
How the Serene Duo-Sleek 2-Stage (EM009) 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.
Within the typical range for two-stage crib mattresses (7.5 lb to 14 lb).
Within the typical range for two-stage crib mattresses (5 in to 6 in).
Below the typical range for two-stage crib mattresses ($89.99 to $189.99).
What sets the Serene Duo-Sleek 2-Stage (EM009) apart
Measured against the 82 two-stage crib mattresses we compare, from each maker's published specs.
- Weight: 7.8 lbin the middle half of the 69 two-stage crib mattresses that publish it (7.5 lb to 14 lb)
Next to its closest matches
- Dream On Me Breathable Orthopedic Firm Foam Standard Crib Mattress, WhiteNext to it, the Serene Duo-Sleek 2-Stage (EM009) is 1.8 lb heavier; 0.8 in thicker.
- Dream On Me Breathable Orthopedic Extra Firm Crib and Toddler MattressNext to it, the Serene Duo-Sleek 2-Stage (EM009) is 1.8 lb heavier; 0.8 in thicker.
- Dream On Me Dreamland Orthopedic Firm Fiber Crib and Toddler Bed MattressNext to it, the Serene Duo-Sleek 2-Stage (EM009) is 1.8 lb heavier; 0.8 in thicker.
Fit check
| Size, per the maker | 52 × 28 × 5.75 in |
|---|---|
| Sides | Two: a firmer infant side and a toddler side, per the maker |
Crib types on Cribpicks that take a full-size crib mattress:
Listed features
- Lowest price in this group
- Light at 7.8 lb
- Firmer infant side
Where to buy the Serene Duo-Sleek 2-Stage (EM009)
Prices and availability change. We may earn a commission from some links.
- 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 (Kolcraft) Serene Duo-Sleek 2-Stage (EM009) | |
|---|---|
| Type | Two-stage crib mattress |
| List price | $69.99 |
| Size | 52 × 28 × 5.8 in |
| Thickness | 5.8 in |
| Weight | 7.8 lb |
| Core | Polymer: polymer/poly fiber: springless airy poly-core (maker: no polyurethane or latex foam) |
| Two-stage | Yes, infant and toddler sides |
| Firm for infants | Yes, per the maker |
| Waterproof | Yes |
| Breathable design | Yes, per the maker |
| Certifications | GREENGUARD Gold |
Compare the Serene Duo-Sleek 2-Stage (EM009) with
How each closest rival differs from the Serene Duo-Sleek 2-Stage (EM009), from the makers' specs.
- Dream On MeBreathable Orthopedic Firm Foam Standard Crib Mattress, White6 lb5 in thick$69.99
- 1.8 lb lighter
- 0.8 in thinner
- Dream On MeBreathable Orthopedic Extra Firm Crib and Toddler Mattress6 lb5 in thick$69.99
- 1.8 lb lighter
- 0.8 in thinner
- Dream On MeDreamland Orthopedic Firm Fiber Crib and Toddler Bed Mattress6 lb5 in thick$69.99
- 1.8 lb lighter
- 0.8 in thinner
- Simmons KidsSilver Nights Dual Sided 2-Stage Crib and Toddler Mattress8.5 lb5 in thick$79.99
- 0.7 lb heavier
- 0.8 in thinner
- $10 more
Serene Duo-Sleek 2-Stage (EM009): questions answered
From Sealy Baby (Kolcraft)'s published specs, last checked 2026-11-02.
Will the Sealy Serene Duo-Sleek 2-Stage Crib Mattress fit my crib?
The maker lists it at 52 × 28 × 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 Serene Duo-Sleek 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 Serene Duo-Sleek 2-Stage Crib Mattress made of?
Polymer/poly fiber: springless airy poly-core (maker: no polyurethane or latex foam). The maker lists GREENGUARD Gold. It weighs 7.8 lb, which matters when you change sheets.
Is the Sealy Serene Duo-Sleek 2-Stage Crib Mattress waterproof or washable?
The maker says it has a waterproof surface or cover.
What's the difference between the Sealy Serene Duo-Sleek 2-Stage Crib Mattress and the Dream On Me Breathable Orthopedic Firm Foam Standard Crib Mattress, White?
By the maker specs, the Breathable Orthopedic Firm Foam Standard Crib Mattress, White is lighter (6 vs 7.8 lb). See them side by side.
Still wondering? Write to us at hello@cribpicks.com and we'll look it up.
More two-stage crib mattresses
- EvolurSleep Dual Stage Comfort-Lite 5" Foam Mattress9 lb5 in thick$76.99
- Dream On MeLittle Baby 6 Inch Full Size Firm Fiber Crib and Toddler Bed Mattress6 lb6 in thick$59.99
- Dream On Me2 in 1 Serene Snooze Crib and Toddler Mattress6 lb5 in thick$59.99
- Dream On MeJoyful Blooms Breathable Foam Crib and Toddler Mattress6 lb5 in thick$79.99
- Serta (made by Delta Children)SleepTrue Sparkling Sky8.5 lb5 in thick$89.99
- Delta ChildrenRefresh 2-Stage Crib and Toddler Mattress8.5 lb5 in thick$89.99
Where these specs come from
Last checked 2026-11-02. Spot something wrong? Tell us. Read our editorial and safety policy and corrections.