StoreDeal.ai store
Shop
  • Deals
  • Deal checker
  • Black Friday
  • Buying guides
  • Brands
  • Stores
Travel
  • Flight deals
  • Hotel deals
Company
  • Research
  • Press
  • Use in AI assistants
  • Contact
  • deal.ai apps
Black Friday 2026
  • Walmart
  • Best Buy
  • Target
  • TVs
  • Laptops
  • Headphones
  • Apple
  • Gaming
  • Vacuums
  • Kitchen
  • Toys
  • Smartwatches
  • Tablets
  • Furniture
  • Mattresses
© Deal.ai Inc.·2222 Ponce de Leon Blvd, Miami, FL 33134·support@deal.ai
TermsPrivacy
Deal.ai › Compare

Serta SleepTrue Mini Crib Mattress vs Moonlight Slumber Little Dreamer

Buy the Moonlight Slumber Little Dreamer if you want one mattress to carry your child from newborn through the toddler years. Its dual-sided foam flips from firm infant support to a plusher toddler surface, and the 5-inch build with a stretch-knit waterproof cover feels more substantial than the Serta. The Serta SleepTrue is the simpler, lighter pick for a portable crib you move around, and owners consistently call it firm and easy to wipe clean. Both are GREENGUARD Gold certified; the Moonlight is the step up in comfort and longevity, the Serta in portability and easy care.

  • Choose the Serta SleepTrue Mini Crib Mattress if you need a lightweight, wipe-clean mattress for a portable or mini crib and want a straightforward firm surface for a baby.
  • Choose the Moonlight Slumber Little Dreamer if you want a dual-sided mattress that stays with your child into the toddler stage and prefer a softer knit cover over vinyl.

Prices

  • Serta SleepTrue Mini Crib Mattress: $49.99 at Kidsy (checked today)
  • Moonlight Slumber Little Dreamer: $129.99 at Walmart (checked today)
  • Difference: the Serta SleepTrue Mini Crib Mattress is $80.00 cheaper than the Moonlight Slumber Little Dreamer today
Serta
Serta SleepTrue Mini Crib Mattress

Serta SleepTrue Mini Crib Mattress

$49.99at KidsyChecked 1 h ago
See all prices and details
Visit Kidsy
Pros
  • Firm fiber core gives infants steady support
  • Waterproof vinyl wipes clean fast
  • Light enough to move between portable cribs
  • GREENGUARD Gold certified
  • Made partly from recycled bottles
Cons
  • Single firmness, no toddler side
  • Vinyl cover feels less soft than knit
  • Only 4 inches thick
  • Not designed for the toddler-bed years
Moonlight Slumber
Moonlight Slumber Little Dreamer

Moonlight Slumber Little Dreamer

4.9(36 ratings)
$129.99at WalmartChecked 25 min ago
See all prices and details
Visit Walmart
Pros
  • Dual-sided for infant and toddler stages
  • Thicker 5-inch foam build
  • Soft stretch-knit waterproof cover
  • Lifetime warranty
  • GREENGUARD Gold certified
Cons
  • Heavier at 7 lb
  • Knit cover needs gentler cleaning than vinyl
  • Foam core rather than fiber
  • Costs more than the Serta

What separates them

Serta SleepTrue Mini Crib MattressMoonlight Slumber Little Dreamer
Thickness4 inches5 inches
FirmnessSingle firm fiber core for infantsDual-sided: firm infant side, plush toddler side
Core materialRecycled polyester fiber from plastic bottlesHigh-density foam
CoverWaterproof vinyl, wipes clean4-way stretch-knit, waterproof and stain resistant
WeightLightweight, easy to lift and flip7 lb
CareWipe with a damp cloth; vinyl resists stainsDamp sponge and mild soap only; no diaper wipes or bleach
Warranty10 yearsLifetime product warranty
Age rangeBabyPreemie, newborn, infant, toddler

Price history

$129.99$49.99
Nov 8Nov 15
  • Serta SleepTrue Mini Crib Mattress: lowest $49.99 on Nov 8 at Kidsy; $49.99 on Nov 15.
  • Moonlight Slumber Little Dreamer: lowest $129.99 on Nov 15 at Walmart.

Prices at every store

Serta SleepTrue Mini Crib Mattress

  • KidsyNew

    In stock

    $49.99Checked 1 h ago
    Visit Kidsy
  • Baby and ToysNew

    In stock

    $94.49Checked Nov 8
    Visit Baby and Toys
  • eBayNew

    In stockSold by irenstore

    $103.38Free shippingChecked 2 h ago
    Visit eBay
  • AmazonNew

    Availability unknown

    As an Amazon Associate, Deal.ai earns from qualifying purchases.

    $62.99Free shippingChecked 1 h ago
    Visit Amazon

Also available at

  • eBayCheck price at eBay

Store links may earn us a commission.

All 5 stores and price history →

Moonlight Slumber Little Dreamer

  • WalmartNew

    In stock

    $129.99Checked 25 min ago
    Visit Walmart

Also available at

  • WalmartCheck price at Walmart
  • eBayCheck price at eBay

Store links may earn us a commission.

Prices and history →

Specs compared

SpecSerta SleepTrue Mini Crib MattressMoonlight Slumber Little Dreamer
TypeMattressLatex Foam
MaterialVinyl coverFoam
Length38 in52 in long
Dimensions38"L x 24"W x 4"Th38"L x 24"W x 5"Th
CertificationGREENGUARD GoldGREENGUARD Gold
Protection PropertiesWaterproof, Hypoallergenic—
Width24 in—
Care InstructionsWipes clean—
Age RangeBaby—
Use CasePortable cribs, Mini cribs—
Solution ForPreventing mold, mildew and odor—
Typical UsersLittle one, Babies—
Show all 33 specsShow fewer specs
SpecSerta SleepTrue Mini Crib MattressMoonlight Slumber Little Dreamer
Coil TypeContinuous Coil—
Specialty StyleTight Top—
CoreFirm fiber core—
CoverWaterproof vinyl—
Size—Mini Crib
Water Resistant—Yes
GREENGUARD Certified—Yes
Thickness—5 in
Bed size—Crib/Toddler Bed
Mattress comfort level

What reviewers say

Moonlight Slumber Little Dreamer

  • 4.9 / 536 ratings

Rated 4.9 out of 5 across 36 ratings, buyers are largely enthusiastic. Parents praise the dual-sided design and the waterproof cover, and many say it has held up well over time.

What people mention
  • FirmnessPraisedParents say the infant side is properly firm for newborns and the toddler side is softer.
  • Waterproof coverPraisedSpills and accidents wipe off the stretch-knit cover instead of soaking in.
  • Build qualityPraisedOwners describe the foam and cover as sturdy and long lasting.
  • Infant side hardnessMixedSome parents find the newborn side very hard, though others see that as correct for safety.

Questions and answers

Which is better for a newborn?
Both work for newborns. The Serta gives a single firm surface, while the Moonlight's infant side is high-density foam that is firm enough for a newborn and flips to plush later.
Which lasts longer?
The Moonlight, because its toddler side extends use past infancy and it carries a lifetime warranty. The Serta's 10-year warranty is solid but its single firmness suits the crib years only.
Is the Moonlight worth stepping up to?
Yes if you want one mattress through the toddler stage and prefer a soft knit cover. The Serta is the better fit if you move a portable crib often and want vinyl you can wipe down.
Which is easier to clean?
The Serta's vinyl wipes clean with little effort. The Moonlight's knit cover is waterproof but the maker says to use only a damp sponge and mild soap, no diaper wipes or bleach.
Do both fit mini cribs?
Yes. Both measure 38 by 24 inches, the standard mini crib size. The Moonlight is 5 inches thick versus 4 for the Serta, so check your crib's sheet fit.

Ask our shopping agent

It checks today's price at every store, compares the alternatives and answers in about a minute.

Enter to send, Shift+Enter for a new line

More comparisons

  • DaVinci Complete Slumber Waterproof Mini Crib Mattress vs Moonlight Slumber Little Dreamer
  • DaVinci Complete Slumber Waterproof Mini Crib Mattress vs Serta SleepTrue Mini Crib Mattress

Buying guides that pick them

  • Best mini crib mattresses
—
Firm for Infants and plush toddler side
Mattress type—Poly Foam Mattresses
Features—Waterproof, Hypoallergenic, Antimicrobial
Mattress thickness—5 in
Brand—Moonlight
Mattress top type—Tight Top
Height—5 in
Weight—7 lb
Assembly req—N
Color—White
Age group—Preemie, Newborn, Infant
Firmness—Firm, dual-sided