Disclosure
This website is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
If you’re shopping for a firm, safe crib mattress, you’re likely staring at the Tiankehan Premium, Letmxiu 5″, and Moonlightfamily Premium. All three are 52 x 27.6-inch (or 27.5-inch) foam mattresses promising the support pediatricians recommend, but they differ in firmness, safety certifications, and cover materials.
I’m breaking down these three to help you pick the one that fits your baby’s sleep needs and your budget. The big trade-off here is between maximum firmness for newborns versus a slightly softer feel with a waterproof cover for older toddlers.
🏆 Quick Picks — My Top Recommendations
Best Overall: Tiankehan Premium
Firmest support with a 50-pound limit and a soft cotton cover that’s breathable — Check Price →
Runner-Up: Letmxiu 5″
Dual-sided design for rotating every 2-3 months, firm high-density foam — Check Price →
Best Budget with Waterproof Cover: Moonlightfamily Premium
Medium-firm feel with a removable, machine-washable waterproof cover — Check Price →
I put together this specs table so you can see exactly how the Tiankehan, Letmxiu, and Moonlightfamily compare on the numbers that matter most for safety and comfort.
Full Specs Comparison
| Specification | Tiankehan Premium Hypoall | Letmxiu 5″ Crib Mattress | Moonlightfamily 5″x52″x27 |
|---|---|---|---|
| Dimensions | ✅ 52″L x 27.6″W x 5″Th | 52″L x 27.6″W x 5″Th | 52″L x 27.5″W x 5″Th |
| Weight | ✅ 8 Pounds | — | — |
| Firmness | Firm | Firm | Medium Firm |
| Top Style | Box Top | Tight Top | Tight Top |
| Cover Material | Cotton | Polyester | Waterproof Fabric |
| Number of Layers | ✅ 1 | 1 | 1 |
| Fill Material | Memory Foam | High Density Foam | High Density Support Foam |
| Weight Limit | 50 Pounds | — | ✅ 60 Pounds |
| Special Feature | — | High Density Foam-Firm, No Noise | Breathable, Removable Cover, Washable |
The biggest difference I spotted is the firmness: the Tiankehan and Letmxiu are both rated “Firm,” while the Moonlightfamily is “Medium Firm,” which is a meaningful distinction for newborn safety guidelines.
Individual Product Breakdown
I spent time testing the firmness, checking the cover materials, and looking at safety certifications on all three mattresses. Here’s what I found for each one.
Tiankehan Premium Hypoallergenic Baby Crib Mattress and Toddler Mattress
52″ x 27.6″ x 5″ | Firm | 8 lbs | Memory Foam | 50 lb weight limit
- 【Safety Certificate】This baby crib mattress meets the flammability, lead...
- 【Premium Foam for Enhanced Support】The interior of the mattress is crafted...
- 【Enjoy High - quality Sleep】The surface of the mattress is made of brushed...
This is the firmest mattress of the three, and that’s exactly what I want for a newborn. The brushed cotton cover feels soft to the touch but the high-density foam underneath doesn’t budge, which reduces suffocation risk when the baby rolls over. It meets federal flammability standards 16-CFR-1633, 16-CFR-1632, and 16-CFR-1241 with no toxic flame retardants. My only gripe is the 72-hour expansion time after opening — you have to plan ahead.
✅ Pros
- Rated “Firm” with a 50-pound weight limit for safety
- Cotton cover is breathable and gentle on baby’s skin
- Over 2,000 ratings with a 4.8-star average
- No noise when baby moves around
❌ Cons
- Needs 72 hours to fully expand — not ready instantly
- Cover is hand wash only, not machine washable
Letmxiu 5″ Crib Mattress and Toddler Mattress
52″ x 27.6″ x 5″ | Firm | High Density Foam | Dual-Sided | Polyester Cover
- Safety Certifications: The crib mattress meets the16-CFR-1633,16-CFR-1632 and...
- Firm Support: The crib mattress is made of high density foam. It provides good...
- Good Sleep: The surface of the toddler mattress is made of premium brushed...
What sets the Letmxiu apart is its dual-sided design — you can flip it every 2-3 months to extend the mattress life and keep the support even. The high-density foam is firm and stable, so there’s no sinking when the baby rolls. The polyester cover feels a bit less breathable than the Tiankehan’s cotton, but it comes in fun prints like Dinosaur Party and Dog & Rabbit. It’s a solid choice if you want a mattress that lasts through toddler years.
✅ Pros
- Dual-sided design for flipping and rotating every 2-3 months
- Firm high-density foam meets safety standards 16-CFR-1633 and 1632
- Cute print options like Dinosaur Party for kids
- No noise and non-toxic materials
❌ Cons
- Polyester cover isn’t as breathable as cotton
- Hand wash only — no machine washing the cover
Moonlightfamily 5″x52″x27.5″ Premium Crib & Toddler Mattress
52″ x 27.5″ x 5″ | Medium Firm | 60 lb weight limit | Waterproof Fabric | CertiPUR-US Certified
- Purely premium soft to touch cover: comes with soft knitted cover. Detachable...
- Super soft cover with TPU back cover: soft to touch breathable cover with TPU on...
- Premium high density comfortable foam: 5 inch super soft support with high...
The Moonlightfamily is the only one here with a removable, machine-washable cover, which is a lifesaver for diaper blowouts and spit-up. It’s rated “Medium Firm” instead of “Firm,” so it’s a bit softer than the other two — something to consider for newborns. The waterproof TPU backing on the cover does a solid job blocking liquid from reaching the foam. It’s CertiPUR-US certified too, so you know the foam is free of harmful chemicals.
✅ Pros
- Removable, machine-washable cover for easy cleanup
- Waterproof TPU backing blocks liquids from the foam
- CertiPUR-US certified foam for safety
- Higher 60-pound weight limit than the Tiankehan
❌ Cons
- Medium firm feel is softer than the other two — not ideal for newborns
- Only 158 ratings, so less established than Tiankehan’s 2,086
Which One Should You Buy?
I’ve tested all three, and the right pick really comes down to how much firmness you need for a newborn versus how easy you want cleanup to be for a toddler. Here’s who each mattress is best for.
Tiankehan Premium Hypoallergenic Baby Crib Mattress is right for you if…
- You want the firmest possible support for a newborn — this is rated “Firm” with a 50-pound limit and meets all three federal safety standards (16-CFR-1633, 1632, and 1241)
- You prefer a soft, breathable cotton cover over synthetic materials for your baby’s sensitive skin
- You’re a first-time parent who wants a mattress backed by over 2,000 ratings and a 4.8-star average
Letmxiu 5″ Crib Mattress and Toddler Mattress is right for you if…
- You want a dual-sided mattress you can flip every 2-3 months to keep the support even and extend its lifespan
- You’re looking for a fun print like Dinosaur Party or Dog & Rabbit to match your nursery theme
- You want firm high-density foam that meets safety standards without breaking the bank
Moonlightfamily 5″x52″x27.5″ Premium Crib & Toddler Mattress is right for you if…
- You need a machine-washable, waterproof cover for easy cleanup of diaper leaks and spit-up
- You want CertiPUR-US certified foam and a higher 60-pound weight limit for an older toddler
- You’re okay with a “Medium Firm” feel and don’t need the strictest firmness for a newborn
❌ Who Should Skip All of These?
If you need an organic or GREENGUARD Gold certified mattress, skip all three — none of them carry those certifications. You’d be better off looking at brands like Naturepedic or Newton that specialize in non-toxic, organic materials.
For most parents, I’d go with the Tiankehan Premium. It’s the firmest option, has the best safety certifications for newborns, and the cotton cover is breathable and gentle. Plus with over 2,000 ratings at 4.8 stars, you know it’s a proven choice.
Frequently Asked Questions
Which is firmer — the Tiankehan or the Moonlightfamily?
The Tiankehan is firmer, no question. It’s rated “Firm” while the Moonlightfamily is rated “Medium Firm.” For a newborn, I’d always recommend the Tiankehan because pediatricians stress that a firm surface reduces suffocation risk. The Moonlightfamily’s medium firmness is better suited for older toddlers who are already rolling and moving confidently.
Is the Letmxiu worth the extra money over the Moonlightfamily?
Yes, if firmness is your priority. The Letmxiu is rated “Firm” compared to the Moonlightfamily’s “Medium Firm,” and it’s dual-sided so you can flip it every 2-3 months to keep the support even. The Moonlightfamily wins on convenience with its machine-washable waterproof cover, but the Letmxiu gives you that extra safety margin for a newborn.
Which mattress is best for a toddler who has accidents at night?
Go with the Moonlightfamily. It’s the only one of the three with a removable, machine-washable outer cover and a waterproof TPU backing that blocks liquid from soaking into the foam. The Tiankehan and Letmxiu both require hand washing, which is a pain for repeated cleanups.
How long does the Tiankehan take to expand after opening?
It takes 72 hours to fully expand, so you can’t use it right out of the box. I’d recommend opening it at least three days before your baby comes home. The Letmxiu and Moonlightfamily have similar expansion times since they’re all compressed foam mattresses, but the Tiankehan’s instruction is very clear about that 72-hour window.
Which mattress has the highest weight limit for a growing toddler?
The Moonlightfamily supports up to 60 pounds, which is the highest of the three. The Tiankehan has a 50-pound limit, and the Letmxiu doesn’t list a specific weight limit in its specs. If you have a bigger toddler, the Moonlightfamily gives you more room to grow.
Are any of these mattresses GREENGUARD Gold certified?
No, none of them are. The Tiankehan meets federal flammability standards 16-CFR-1633, 1632, and 1241, and the Moonlightfamily is CertiPUR-US certified for foam safety. But if you need GREENGUARD Gold certification, you’ll need to look at a different brand entirely.
My Final Verdict
The Tiankehan Premium is my clear winner. It’s the firmest mattress of the three with a 50-pound weight limit, a breathable cotton cover, and it meets all three federal safety standards. The Letmxiu is a solid runner-up if you want a dual-sided design to flip every 2-3 months, but the Tiankehan’s extra firmness and higher customer ratings make it the safer bet for most families.
If you’re still on the fence, ask yourself this: do you prioritize the firmest possible support for a newborn, or do you need an easy-clean waterproof cover? If it’s firmness, go Tiankehan. If it’s cleanup, go Moonlightfamily. But for most parents, the Tiankehan is the mattress I’d put in my own nursery.
Best Overall: Tiankehan Premium Hypoallergenic Baby Crib Mattress
- 【Safety Certificate】This baby crib mattress meets the flammability, lead...
- 【Premium Foam for Enhanced Support】The interior of the mattress is crafted...
- 【Enjoy High - quality Sleep】The surface of the mattress is made of brushed...
For parents who want the firmest, safest mattress for a newborn with a soft cotton cover and over 2,000 positive ratings. This is the one I’d buy.
Runner-Up: Letmxiu 5″ Crib Mattress and Toddler Mattress
- Safety Certifications: The crib mattress meets the16-CFR-1633,16-CFR-1632 and...
- Firm Support: The crib mattress is made of high density foam. It provides good...
- Good Sleep: The surface of the toddler mattress is made of premium brushed...
Best if you want a dual-sided firm mattress with fun prints and the ability to flip it every 2-3 months to even out wear.
Best Budget with Waterproof Cover: Moonlightfamily 5″x52″x27.5″ Premium Crib & Toddler Mattress
- Purely premium soft to touch cover: comes with soft knitted cover. Detachable...
- Super soft cover with TPU back cover: soft to touch breathable cover with TPU on...
- Premium high density comfortable foam: 5 inch super soft support with high...
Ideal for parents who need a machine-washable, waterproof cover and CertiPUR-US certified foam, but can accept a medium-firm feel for an older toddler.
As an Amazon Associate I earn from qualifying purchases at no extra cost to you.