Sealy Butterfly 2-Stage Breathable Knit Crib Mattress
The Sealy Butterfly 2-Stage Breathable Knit Crib Mattress weighs 9 lb and is 5 in thick, per Sealy Baby. A two-layer foam mattress with a high-density infant side, memory foam toddler side and a machine washable knit cover.
- $149.99List price
- 5 inThickness
- 9 lbWeight
- FoamCore
How the Butterfly 2-Stage Breathable Knit (EM904) 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).
Within the typical range for two-stage crib mattresses ($89.99 to $189.99).
What sets the Butterfly 2-Stage Breathable Knit (EM904) apart
Measured against the 82 two-stage crib mattresses we compare, from each maker's published specs.
- Weight: 9 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
- DaVinci Premium 2-Stage Breathable Crib MattressNext to it, the Butterfly 2-Stage Breathable Knit (EM904) is 0 lb heavier; 0.3 in thinner.
- Evolur Sleep Triple Stage Air Flow Crib Mattress with Natural FiberNext to it, the Butterfly 2-Stage Breathable Knit (EM904) is 1 in thinner; $20 more.
- Sealy Baby OptiCool 2-Stage (EM822)Next to it, the Butterfly 2-Stage Breathable Knit (EM904) is 2.9 lb lighter; 0.3 in thinner.
Fit check
| Size, per the maker | 52 × 28 × 5 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
- Machine washable zip-off cover
- Waterproof protection
- Firm infant side
- Made in USA
Worth checking
- Highest price in the Butterfly line
Where to buy the Butterfly 2-Stage Breathable Knit (EM904)
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 Butterfly 2-Stage Breathable Knit (EM904) | |
|---|---|
| Type | Two-stage crib mattress |
| List price | $149.99 |
| Size | 52 × 28 × 5 in |
| Thickness | 5 in |
| Weight | 9 lb |
| Core | Foam: high-density infant side and soy-enhanced memory foam toddler side |
| Two-stage | Yes, infant and toddler sides |
| Firm for infants | Yes, per the maker |
| Waterproof | Yes |
| Washable cover | Yes |
| Breathable design | Yes, per the maker |
| Certifications | GREENGUARD Gold, CertiPUR-US |
| Made in | USA |
Compare the Butterfly 2-Stage Breathable Knit (EM904) with
How each closest rival differs from the Butterfly 2-Stage Breathable Knit (EM904), from the makers' specs.
- DaVinciPremium 2-Stage Breathable Crib Mattress9 lb5.3 in thick$149
- 0 lb lighter
- 0.3 in thicker
- $1 less
- EvolurSleep Triple Stage Air Flow Crib Mattress with Natural Fiber9 lb6 in thick$129.99
- 1 in thicker
- $20 less
- Sealy BabyOptiCool 2-Stage (EM822)11.9 lb5.3 in thick$149.99
- 2.9 lb heavier
- 0.3 in thicker
- Simmons KidsNaturally Crib and Toddler Mattress6 in thick$129$129.99
- 1 in thicker
- $20 less
Butterfly 2-Stage Breathable Knit (EM904): questions answered
From Sealy Baby's published specs, last checked 2026-11-02.
Will the Sealy Butterfly 2-Stage Breathable Knit Crib Mattress fit my crib?
The maker lists it at 52 × 28 × 5 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 Butterfly 2-Stage Breathable Knit 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 Butterfly 2-Stage Breathable Knit Crib Mattress made of?
High-density infant side and soy-enhanced memory foam toddler side. The maker lists GREENGUARD Gold, CertiPUR-US. It weighs 9 lb, which matters when you change sheets.
Is the Sealy Butterfly 2-Stage Breathable Knit Crib Mattress waterproof or washable?
The maker says it has a waterproof surface or cover. It has a removable, machine-washable cover.
What's the difference between the Sealy Butterfly 2-Stage Breathable Knit Crib Mattress and the DaVinci Premium 2-Stage Breathable Crib Mattress?
By the maker specs, the Premium 2-Stage Breathable Crib Mattress lists for $0.99 less, the Premium 2-Stage Breathable Crib Mattress is lighter (8.97 vs 9 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
- Sealy Baby (Kolcraft)Soybean Foam-Core 2-Stage (EM710)5 in thick$129$129.99
- GracoUltra Premium 2-in-1 Crib and Toddler Mattress12.7 lb6 in thick$149.99
- Sealy BabyButterfly 2-Stage (EM906)9 lb5 in thick$119.99
- GracoDual Comfort 6-Inch Crib and Toddler Mattress12 lb6 in thick$139.99
- Sealy Baby (Kolcraft)Cozy Dreams Premier 2-Stage (EM032)9 lb6 in thick$189.99
- EvolurBarbie Chasing Dreams 2-in-1 Crib and Toddler Mattress5.8 in thick
Where these specs come from
Last checked 2026-11-02. Spot something wrong? Tell us. Read our editorial and safety policy and corrections.