9 Best Delta Children Crib Mattresses (November 2026)
The best Delta Children crib mattresses include the Delta Children Twinkle Galaxy Dual Sided Crib for most standard cribs, the Dourxi Crib Mattress for dual foam comfort, and the Sealy Baby Flex Cool 2 Stage Crib for coil support.
On this page (7 sections)
- Which Delta Children crib mattress is best for most standard cribs?
- How do Delta Children crib mattresses compare by construction?
- What size Delta Children crib mattress do you need?
- Which cover is easiest to clean?
- Can you use memory foam in a baby crib?
- How should you set up and care for a new crib mattress?
- Which Delta Children crib mattress should you choose?
The best Delta Children crib mattress for most standard cribs is the Delta Children Twinkle Galaxy Dual Sided Crib. It combines a firm recycled fiber core, waterproof cover, standard crib dimensions and toddler-bed use in one balanced design.
Your crib’s inside dimensions should decide the purchase before the brand does. If you have a Babyletto Hudson, compare mattresses for the Hudson crib against its fit requirements.
Measure the sleep surface, confirm whether you need a standard or mini crib mattress, and check that the mattress sits flat with no unsafe gaps.
For a broader look at firmness, covers, construction and fit, use this crib mattress comparison guide. If you need a wider comparison beyond Delta Children, see the best full size crib mattress roundup.
Our picks at a glance
-
1
Best for most standard cribsDelta Children Twinkle Galaxy Dual Sided Crib
9.7/10 our score
See it on Amazon -
2
-
3
- 4
Check itLetmxiu 5" Crib Mattress and Toddler Mattress
Best for simple firm foam - 5
Check itDelta Children Serta SleepTrue Mini Crib Mattress
Best for mini and portable cribs - 6
Check itDelta Children Sweet Beginnings Dual Sided Baby
Best for plant-based foam - 7
Check itSealy Baby Posturepedic Grow 2-Stage Crib
Best for hybrid support - 8
Check itDelta Children Twinkle Stars Crib and Toddler
Best for a washable cover - 9
Check itDelta Children Serta Perfect Start Breathable Limited Two
Best for two-stage fiber support
Which Delta Children crib mattress is best for most standard cribs?
The Delta Children Twinkle Galaxy Dual Sided Crib is the strongest all-around choice because it has a firm fiber core, waterproof protection on both sides, square corners and a standard 52 x 27.5 in footprint. Its dual-sided design also supports use through the toddler-bed stage.
We compared construction, firmness, dimensions, cleaning features, certifications and intended crib size. Our score weighs specs, features and buyer feedback against what you're shopping for.
Delta Children Twinkle Galaxy Dual Sided Crib: Best for most standard cribs
- 52 x 27.5 x 5 in
- Firm recycled fiber core
- Waterproof vinyl cover
- GREENGUARD Gold certified
- 7-year warranty
A standard-size dual-sided mattress with a firm fiber core, waterproof cover and square corners. It fits cribs and toddler beds and is made in the USA.
Pros
- Standard crib and toddler-bed size
- Waterproof cover on both sides
- GREENGUARD Gold certified
Cons
- Needs 24 to 72 hours to regain full shape
The Twinkle Galaxy uses a firm fiber core made from upcycled plastic bottles and measures 52 x 27.5 x 5 in. That footprint suits most standard cribs and toddler beds, and the square corners help it sit flat without bunching at the edges.
Both sides have a waterproof vinyl cover, so you can flip the mattress when your child moves from crib to toddler bed. The hypoallergenic cover wipes clean, which makes spit-up and wet sheets less of a project during night changes.
Delta Children says the mattress is GREENGUARD Gold and JPMA certified. It is made in the USA and carries a 7-year warranty, which may matter if you plan to use it through several stages.
Allow 24 to 72 hours for the mattress to regain its full shape after delivery. Warmer rooms help memory foam expand faster, while cold delivery conditions can slow that process.
This is the best Delta Children crib mattress for a standard crib when you want a firm fiber core, waterproof protection and long-term two-sided use. Its main trade-off is a wipe-clean cover rather than one you can remove and wash.
Dourxi Crib Mattress: Best for dual foam comfort
- 52 x 27.5 x 6 in
- Firm infant side
- Softer toddler side
- Gel and open-cell memory foam
- Washable removable cover
Dourxi uses two firmness sides and a triple-layer foam design for infant and toddler stages. Its removable cover adds a practical cleaning option.
Pros
- Dual firmness
- Washable cover
- CertiPUR-US certified foam
Cons
- Needs at least 72 hours to expand
Dourxi is a useful alternative when you prefer a foam mattress with two firmness sides. The infant side is firmer and flat for early support, while the toddler side adds a softer memory foam surface for more cushioning as your child grows.
Its 52 x 27.5 x 6 in size fits standard cribs, convertible cribs and toddler beds. The triple-layer construction combines gel-infused memory foam, open-cell memory foam and a high-density support core, so the feel changes with the side you choose rather than with a separate pad.
The removable cotton-blend cover is washable, giving it a different care routine from Delta Children mattresses with fixed vinyl or encased covers. That can help if you prefer laundry to wiping for everyday spills and sheet changes.
Dourxi uses CertiPUR-US certified foam and states that the mattress is free of phthalates, lead and mercury. It also lists a 60-day return policy and a limited 10-year warranty, so check the current terms before you decide.
Choose Dourxi if a washable cover and dual foam comfort matter more than a Delta Children brand match. Unroll it and allow at least 72 hours for expansion at room temperature, and confirm full thickness before use.
Sealy Baby Flex Cool 2 Stage Crib: Best for coil support
- 52 x 28 x 5.75 in
- Firm infant side
- Softer toddler side
- Cotton cover
- Waterproof PVC-free barrier
This two-stage Sealy uses an interwoven coil system, reinforced borders and a breathable cotton cover. It is GREENGUARD Gold certified and made in the USA.
Pros
- Coil construction
- Waterproof PVC-free barrier
- Reinforced border edges
Cons
- Wider than 27.5 in models
Sealy Baby Flex Cool suits buyers who want coil construction and a breathable cotton cover. Its 204 interwoven coils sit within cotton cushioning, with reinforced borders and strength pillars that keep the edges firm.
It measures 52 x 28 x 5.75 in, so check your crib inside width first. The extra half inch compared with 27.5 in models can decide whether it fits snugly or leaves a gap.
A firm infant side and softer toddler side cover two stages without a second mattress. The coil base gives a more conventional innerspring feel than fiber or foam alone.
A PVC-free waterproof barrier protects against leaks, while airflow channels in the cotton cover support ventilation. The cotton feels less plasticky than vinyl, though serious spills still rely on the barrier underneath.
The mattress is GREENGUARD Gold certified, ASTM tested and made in the USA, without phthalates, lead, latex or harsh VOCs. Choose it for coil support and a wider 28-inch fit, not for a crib built for 27.5-inch models.
Letmxiu 5" Crib Mattress and Toddler Mattress: Best for simple firm foam
- 52 x 27.6 x 5 in
- High-density firm foam
- Hypoallergenic
- Soft brushed fabric
- Fits standard cribs and toddler beds
Letmxiu keeps the design straightforward with a 5-inch high-density foam core and a soft brushed fabric surface. It is vacuum packed for delivery.
Pros
- Firm support
- Standard crib size
- Federal flammability tests stated
Cons
- Needs 24 to 72 hours to expand
Letmxiu is the simple choice for a firm, high-density foam mattress without a two-sided construction described in the product details. It measures 52 x 27.6 x 5 in and fits standard cribs and toddler beds.
The polyester surface uses a soft brushed fabric designed for quiet comfort. That may suit parents who want less noise when a baby shifts or rolls during the night.
The mattress is vacuum packed, so cut the plastic carefully and allow 24 to 72 hours for full expansion. Do not place it in the crib until it has regained its full shape and sits flat.
Letmxiu states that the mattress meets 16 CFR 1633, 16 CFR 1632 and 16 CFR 1241 federal flammability tests. Those details help you compare safety claims, but the fit and firmness still need to match your crib and your child stage.
The brand recommends flipping or rotating the mattress every 2 to 3 months to maximise performance. That routine may spread wear more evenly, though you should follow the care guidance for your exact model.
Choose it when firm foam, standard sizing and a straightforward care routine are your priorities. Its simpler design means fewer stage-specific features, so weigh that against the dual-sided options if you want one mattress for infancy and toddlerhood.
Delta Children Serta SleepTrue Mini Crib Mattress: Best for mini and portable cribs
- 38 x 24 x 4 in
- Firm recycled fiber core
- Waterproof vinyl cover
- GREENGUARD Gold certified
- 10-year warranty
This compact Delta Children mattress fits most mini and portable cribs. Its 4-inch firm recycled fiber core and waterproof cover suit smaller sleep spaces.
Pros
- Designed for mini and portable cribs
- Lightweight at 3.9 lb
- Waterproof wipe-clean cover
Cons
- Not designed for standard cribs or pack 'n plays
The Delta Children Serta SleepTrue Mini Crib Mattress is the right match for mini and portable cribs, not standard full-size cribs. It measures 38 x 24 x 4 in and weighs 3.9 lb, so it is much lighter to move and store.
Its firm recycled polyester fiber core provides a compact alternative to a standard mattress. The sustainably sourced core is made from upcycled plastic bottles, which may appeal if recycled materials matter to you.
The waterproof vinyl cover is hypoallergenic and wipes clean after everyday nursery messes. That makes it practical for travel or a smaller nursery, where quick spot cleaning is often enough.
Delta Children says it fits most mini and portable cribs, but it is not designed for standard cribs or pack 'n plays. Because small crib dimensions vary, measure the inside length and width before ordering and confirm the mattress fits without unsafe gaps.
The mattress is GREENGUARD Gold certified and has a 10-year warranty. Allow 24 to 72 hours for it to regain its full shape after delivery, especially if it arrives compressed in cold conditions.
This is the best Delta Children mattress here for a smaller sleep surface. Do not use its compact dimensions as a substitute for a standard crib mattress.
Delta Children Sweet Beginnings Dual Sided Baby: Best for plant-based foam
- 52 x 27.5 x 5 in
- Firm plant-based soy foam
- Waterproof knit cover backing
- GREENGUARD Gold certified
- 5-year warranty
Sweet Beginnings combines a firm plant-based foam core with a waterproof backing and two-sided use. It ships compressed in a lightweight box.
Pros
- Plant-based soy foam
- Standard full-size crib fit
- CertiPUR-US certified foam
Cons
- Cover is not intended to be removed or washed
Sweet Beginnings is best for buyers who want plant-based soy foam in a standard crib mattress. It measures 52 x 27.5 x 5 in and fits standard full-size cribs and toddler beds.
The firm foam core uses plant-based soy, while the soft knit cover has waterproof backing. Its feel is closer to foam than to the recycled fiber models, so surface preference may decide between them.
Both sides have waterproof backing, so you can flip the mattress for toddler-bed use. That refreshes the sleep surface without buying another mattress.
The foam is CertiPUR-US certified and the mattress is GREENGUARD Gold certified. It is free from added toxic fire retardants, lead and phthalates, and uses 100% cotton fire protection.
The cover is not intended to be removed or washed, so care means wiping the waterproof surface. If you prefer laundry, Twinkle Stars or Perfect Start may fit better.
It ships compressed in a lightweight box. Open and unroll it within 2 weeks, then allow up to 48 hours to fully expand before first use.
It carries a 5-year limited warranty and is made in the USA. It suits a standard crib where plant-based foam matters more than a washable outer layer.
Sealy Baby Posturepedic Grow 2-Stage Crib: Best for hybrid support
- 52 x 28 x 5.75 in
- Two firmness stages
- Hybrid coil and foam design
- Waterproof binding
- GREENGUARD Gold certified
The Sealy Baby Posturepedic Grow combines coils and gel memory foam in a two-stage design. Its reinforced cover has waterproof binding for wipe-clean care.
Pros
- Hybrid construction
- Two firmness stages
- Made in the USA
Cons
- Wider 28-inch size needs a matching crib
The Sealy Baby Posturepedic Grow is the better fit for hybrid coil and foam support. It measures 52 x 28 x 5.75 in and uses a two-stage design for infant and toddler use.
The firmer infant side has extra firmness at the center, while the toddler side adds cushioning at the head and feet. That zoning aims to match support to how a baby or toddler lies and moves through the night.
Its hybrid design combines coil and gel memory foam construction. Coils help keep the base firm, while the foam layer adds a softer comfort element that fiber-only models do not provide.
The reinforced embossed cover has waterproof binding that helps resist liquid seepage and supports wipe-clean care. It is not described as removable or machine washable, so plan on spot cleaning and a fitted sheet for routine care.
Sealy Baby states that the mattress is GREENGUARD Gold certified, made in the USA and made with CertiPUR-US certified foam. The foam is made without harmful chemicals, phthalates, lead, mercury, formaldehyde or certain flame retardants.
Compare the 28-inch width with your crib before choosing it, because it will not suit every standard frame. For more construction detail, read how to compare crib mattress support types.
Delta Children Twinkle Stars Crib and Toddler: Best for a washable cover
- 52 x 27.5 x 5 in
- Firm recycled fiber core
- Removable machine-washable cover
- Waterproof encasement
- 7-year warranty
Twinkle Stars adds a breathable, removable machine-washable cover to a firm recycled fiber core. A waterproof encasement wipes clean underneath.
Pros
- Machine-washable cover
- Breathable 3-dimensional fabric
- Standard crib and toddler-bed fit
Cons
- The cover and encasement require different cleaning methods
Twinkle Stars is the best choice for a removable machine-washable cover. It measures 52 x 27.5 x 5 in and uses a firm fiber core made from recycled bottles.
The breathable cover has a three-dimensional structure that allows air to move through the fabric and under your baby. That design may help regulate temperature during warm nights, while still keeping a firm sleep surface below.
Remove the cover for machine washing, then wipe the waterproof hypoallergenic encasement separately. The two layers need different care, so check the instructions each time rather than treating the whole mattress as washable.
The mattress is two-sided and fits standard full-size cribs and toddler beds. The fiber core is described as sustainably sourced and helps save over 300 bottles from the landfill.
Delta Children says it is GREENGUARD Gold certified and meets JPMA, CPSIA and ASTM safety testing standards. It is free from added toxic fire retardants, lead and phthalates, with 100% cotton fire protection.
Pick this model when laundry convenience matters more than a fixed vinyl cover. It carries a 7-year limited warranty and is made in the USA of imported and domestic parts.
Delta Children Serta Perfect Start Breathable Limited Two: Best for two-stage fiber support
- 52 x 27.5 x 5 in
- Firm infant side
- Additional fiber pad on toddler side
- Machine-washable cover
- 7-year warranty
Perfect Start uses a firm infant side and an added fiber pad layer on the toddler side. Its breathable cover is removable and machine washable.
Pros
- Two-stage design
- Washable cover
- Waterproof encasement
Cons
- Cover patterns may vary
Perfect Start is the best fit for two-stage recycled fiber support with a washable cover. It measures 52 x 27.5 x 5 in and fits full-size cribs and toddler beds.
The infant side has a firm sleep surface. The toddler side adds a fiber pad layer for comfort as your child grows, so the change comes from flipping the mattress rather than buying another one.
Its breathable three-dimensional cover is removable and machine washable. The fabric allows air to flow through the cover and under your baby, which may help regulate temperature for a more comfortable sleep environment.
The waterproof hypoallergenic encasement wipes clean, creating a two-part care routine. You wash the outer cover and wipe the layer underneath, so keep both sets of instructions handy.
Delta Children says the mattress is GREENGUARD Gold certified and meets JPMA, CPSIA and ASTM standards. The firm fiber core is made from recycled bottles and is free from added toxic fire retardants, lead and phthalates.
Patterns on the cover may vary, so choose it for its construction and care features rather than a specific print. It has a 7-year warranty and is made in the USA of imported and domestic parts.
How do Delta Children crib mattresses compare by construction?
The Delta Children options use firm fiber or plant-based foam construction, while the Sealy alternatives add coils or hybrid coil and foam designs. Dourxi gives you a triple-layer memory foam option with separate infant and toddler sides.
Fiber-core models are a practical match when you want a firm, lightweight mattress with waterproof protection. The Twinkle Galaxy, Twinkle Stars and Perfect Start all use recycled fiber, while Sweet Beginnings uses plant-based soy foam.
The Sealy Flex Cool uses 204 interwoven coils. The Sealy Posturepedic Grow combines coils and gel memory foam.
These models are 28 in wide, so their fit differs from the 27.5 in Delta Children mattresses.
A foam option such as Dourxi may appeal if you want dual firmness and a washable cover. Its 6-inch thickness is also different from the 5-inch Delta Children models, so check crib clearance and sheet fit.
For another compressed option, compare this best crib mattress in a box guide. If you're considering foam and coils together, see the best hybrid crib mattress roundup.
What size Delta Children crib mattress do you need?
Most full-size Delta Children mattresses here measure 52 x 27.5 in, but some alternatives measure 52 x 28 in. The Serta SleepTrue Mini model measures 38 x 24 in and is intended for mini and portable cribs.
Measure the crib’s interior length and width before ordering. A mattress should fit the crib without unsafe gaps, and the crib’s instructions should control if they differ from a general size label.
The thickness ranges from 4 in on the mini mattress to 6 in on Dourxi. A thicker mattress is not automatically a better fit, so check the crib’s approved mattress dimensions.
The crib’s support height also matters as your child grows. Use this guide to how many mattress height settings does a crib need? before choosing a crib and mattress combination.
Which cover is easiest to clean?
The easiest cover to wash is on Twinkle Stars, Perfect Start and Dourxi because each has a removable cover. The easiest surface to wipe clean is on the waterproof vinyl and waterproof-backed models.
Twinkle Stars and Perfect Start use removable machine-washable covers over waterproof encasements. Dourxi has a removable washable outer cover, while the remaining models rely on waterproof surfaces or bindings.
Sweet Beginnings has a soft knit cover with waterproof backing, but its cover is not intended to be removed or washed. Its care routine is therefore different from Twinkle Stars.
Use a fitted crib sheet designed for the mattress size, and follow the mattress and crib instructions for cleaning. If you are buying sheets for another crib brand, compare our guide to the best Babyletto crib sheets for sizing ideas.
Can you use memory foam in a baby crib?
A memory foam crib mattress can suit a crib only when it is designed for crib use, fits correctly and has the firmness specified for infant sleep. A crib mattress is built and tested for that sleep space in a way an adult mattress is not.
Dourxi has a firmer infant side and a softer toddler side. That two-stage approach changes the feel by flipping the mattress, rather than by adding a loose topper.
Do not use a loose adult memory foam mattress or an improvised topper in a crib. Extra layers can create gaps, indentations or soft spots that conflict with the crib maker instructions.
Measure the inside length and width, then confirm the mattress fits the approved dimensions with no unsafe gaps. It must remain flat and work with the crib support system.
Thickness affects sheet fit and how high the sleep surface sits in the crib. A thicker 6-inch model may need a deeper fitted sheet and a different height setting as your child grows.
Compressed foam needs time to expand before use. Dourxi asks for at least 72 hours at room temperature, while other models may list 24 to 72 hours, so follow your exact model.
Keep it in a warm room, since cold conditions can slow expansion.
Certifications help compare materials but do not replace fit and firmness checks. CertiPUR-US, GREENGUARD Gold and federal flammability tests cover different questions about emissions, air quality and fire safety.
A washable cover makes care easier but does not make the mattress itself washable. Follow the guidance for cover, encasement and core separately, and wipe waterproof surfaces promptly.
Read more about can you use a memory foam mattress in a baby crib?. For any sleep concern or ongoing health issue, ask your child clinician.
How should you set up and care for a new crib mattress?
Let a compressed mattress expand for the time stated for its model, then confirm it is fully shaped before use. Delta Children compressed models may need up to 72 hours, Sweet Beginnings up to 48 hours, and Dourxi at least 72 hours at room temperature.
Keep it in a warm room while it expands, because cold conditions can slow the process. Check the corners, edges and surface before fitting a sheet or placing it in the crib.
Check the dimensions against the crib before putting on the fitted sheet. The mattress should fit without unsafe gaps and sit flat across the support system.
Use the correct sheet size and follow the crib maker instructions for mattress height. A shallow sheet can pull up at the corners, while an oversized sheet can bunch and create loose fabric.
Wipe waterproof surfaces promptly and wash removable covers according to their instructions. Vinyl and waterproof-backed covers are usually wiped, while machine-washable covers need their own cycle and drying guidance.
Flip or rotate a mattress only when its design permits it and the manufacturer recommends it. Some models are two-sided for infant and toddler use, while others stay on one side.
Letmxiu recommends flipping or rotating every 2 to 3 months, but treat that routine as model-specific.
Avoid loose padding, toppers or extra soft layers. A crib mattress should be used as a complete, correctly fitted sleep surface.
Inspect it regularly for tears, sagging, loose seams or cover damage. Replace it if it no longer fits the crib, stays flat or shows wear that could affect safety.
Store spare sheets in the right depth, since thickness varies from 4 to 6 inches here.
Which Delta Children crib mattress should you choose?
Choose the Twinkle Galaxy Dual Sided Crib for the best balance of firm recycled fiber support, waterproof two-sided use and standard crib fit. It suits a standard crib where you want a firm core, square corners and a wipe-clean cover on both sides.
Choose Twinkle Stars or Perfect Start if a washable cover is your main priority. Both use a firm recycled fiber core, but their breathable removable covers make laundry part of care, while the waterproof encasement underneath is wiped clean.
Choose Serta SleepTrue Mini only for a mini or portable crib. Its 38 x 24 x 4 in size and 3.9 lb weight suit a smaller sleep space, not a standard crib.
Pick Sweet Beginnings for plant-based soy foam in a standard size. Its soft knit cover and waterproof backing feel different from vinyl, but the cover is not intended to be removed or washed.
The Sealy models suit buyers who want coil or hybrid construction and a 28-inch width. Flex Cool uses 204 interwoven coils with a breathable cotton cover, while Posturepedic Grow combines coils with gel memory foam.
For a foam alternative with two firmness sides, Dourxi is the clearest match. Its 6-inch triple-layer foam and washable cotton-blend cover differ from the Delta Children fiber models in feel and care.
Letmxiu suits a simpler brief for firm high-density foam in a standard size and lacks a two-sided stage design.
Measure your crib first, then match construction and cover care to your daily needs. Fit comes before brand, because a mattress that leaves unsafe gaps or sits unevenly will not work.
Our top 3 picks at a glance
-
1
Best for most standard cribs
Delta Children Twinkle Galaxy Dual Sided Crib
9.7/10 our score
See it on Amazon -
2
-
3
