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The Complete Guide To Buying A Crib Mattress

Curated & Collected

10 minute read

August 4, 2025

Home Blog & Parenting tips Curated & Collected

The Complete Guide To Buying A Crib Mattress

The Complete Guide To Buying A Crib Mattress

When it comes to your baby's sleep, there’s nothing more important than the quality of their mattress. Given that infants sleep up to 18 hours a day, selecting the right crib mattress is a decision that deserves careful thought. After all, your baby’s comfort and safety are paramount. In this guide, we’ll walk you through the essential parameters to consider before buying a crib mattress for your baby's nursery - ensuring that your little one rests peacefully every night.

Baby crawling on a crib mattress in a cozy nursery setting

1. The Right Size

When it comes to buying a crib mattress, size matters. Ensuring that the mattress fits snugly into the crib is the first step to guaranteeing your baby's safety. According to crib manufacturer guidelines, the mattress should be no more than 6 inches thick and should measure at least 27 ¼ x 51 ⅝ inches.

Tip: When checking the fit, be sure that there’s no more than a two-finger gap between the mattress and the crib sides. A snug fit prevents your baby from getting their arms or legs stuck between the mattress and the crib, keeping them safe while they sleep.

Father placing a white Mattress into a gray crib in a bright, modern nursery

Our Pick:

Dream On Me Twilight Innerspring Crib and Toddler Mattress

Features: 88 interwoven coils, waterproof cover, Greenguard Gold certified.

2. Firmness

Firmness is one of the most important considerations when selecting a crib mattress. A mattress that's too soft can increase the risk of suffocation and SIDS (Sudden Infant Death Syndrome). It’s essential to provide your baby with a firm, safe surface to sleep on.

The Hand Press Test is a simple way to assess a mattress's firmness:

  1. Press your hand into the center and sides of the mattress.
  2. Take your hand off and check if there’s any depression left.
  3. If the mattress quickly returns to its original shape, it’s firm enough. If it leaves a mark or doesn’t bounce back, it’s too soft for your infant.
Hand press test on a firm white crib mattress inside a white baby crib

Our Pick:

Evolur Sleep Comfort Plus Classic 150 Coil Inner Spring Crib and Toddler Mattress

Features: 150 heavy-duty interlocking coils, dual-sided for infant and toddler, Greenguard Gold certified.

3. Types of Crib Mattresses

Crib mattresses come in three main types: foam, spring, and fiber. Each offers distinct benefits, and the best choice for you will depend on your needs, preferences, and budget.

Foam Mattresses

Foam mattresses are lightweight and affordable, making them easy to move and clean. Many eco-friendly options are available, offering peace of mind that your baby is sleeping on a non-toxic surface.

ProsCons
Lightweight and easy to cleanMay lose shape over time
Eco-friendly options availableSome lack edge support, which could create gaps in the crib
Greenguard Gold and CertiPUR-US certified Dream On Me 2-in-1 Breathable 3" Spring Coil Portable Crib Mattress

Product Featured - Dream On Me 2-In-1 Breathable 3" Spring Coil Portable/Mini Crib Mattress

Our Pick:

Dream On Me 2-In-1 Breathable 3" Spring Coil Portable Crib Mattress

Features: Lightweight, waterproof cover, hypoallergenic

Spring or Coil Mattresses

Spring mattresses are known for their durability and strong support. They’re a good choice for parents looking for long-term value.

Pros Cons
Great support and durabilityHeavier and more expensive
Excellent edge supportRequires more frequent sheet changes
Evolur crib mattress highlighting waterproof barrier, steel coils, chemical-free fire barrier, and baby-safe removable cover

Product Featured - Evolur Comfort Balance Plus Supreme 260 Coil Inner Spring Crib & Toddler Mattress

Our Pick:

Evolur Sleep Comfort Balance Plus Supreme 260 Coil Inner Spring Crib and Toddler Mattress

Features: 260 heavy-duty coils, dual-sided for infant and toddler, Greenguard Gold certified.

Fiber Mattresses

Fiber mattresses, such as those made from coconut coir, are becoming increasingly popular due to their breathability and natural moisture resistance.

ProsCons
Natural, breathable, and moisture-resistantHeavier than foam
Eco-friendly options like coconut fiberNot as durable as innerspring mattresses

Our Pick:

Dream On Me Asheville 4” Firm Fiber Crib & Toddler Mattress

Features: Eco-fiber core, dual-sided for infant and toddler, waterproof binding, Greenguard Gold certified.

4. Certifications to Look For

When shopping for a crib mattress, it’s essential to ensure it meets safety standards. Certifications like Greenguard Gold and Baby Safety Alliance Verified guarantee that the mattress has been tested for harmful chemicals and pollutants.

  • Greenguard Gold Certification ensures the mattress has been tested for over 10,000 chemicals and harmful VOCs (volatile organic compounds).
  • Baby Safety Alliance Verified certifies that the mattress complies with safety guidelines to keep your baby safe from day one.
Dream On Me crib mattress with a textured dotted surface,GREENGUARD Gold and Baby Safety Alliance Verified for low chemical emissions and safety compliance

Product Featured - Dream On Me Breathable Orthopedic Extra Firm Crib & Toddler Mattress, Blue/White

Our Pick:

Dream On Me Breathable Orthopedic Extra Firm Crib and Toddler Mattress

Features: Greenguard Gold and Baby Safety Alliance Verified, reversible design, waterproof cover.

5. Waterproof Covering

Accidents are inevitable with babies, so a waterproof mattress cover is a must. Many crib mattresses come with built-in waterproof features, or you can buy a separate cover to protect the mattress from spills and accidents.

Our Pick:

Evolur Comfort Cool Flow Foam Crib and Toddler Mattress

Features: Waterproof cover, breathable foam, Greenguard Gold certified.

6. Other Important Features to Consider

  • Dual-Sided: Many crib mattresses are reversible, with a firmer infant side and a cushioned toddler side. This feature allows you to keep the mattress as your baby grows, providing comfort and support at every stage.
  • Flammability: Check if the mattress passes flammability tests and ensure it’s free from chemical-based fire retardants.
  • Hypoallergenic & Non-Toxic: Choosing a mattress made from hypoallergenic, non-toxic materials is essential for your baby’s health and safety.
  • Made in the USA: Mattresses made in the USA are subject to stricter safety regulations, giving you peace of mind that the product meets the highest standards.
Evolur Dual-sided Sleep Comfort Lite Plus crib mattress with extra firm infant side and softer toddler side for two-stage support

Product Featured- Evolur Sleep Comfort Lite Plus with Natural Eucalyptus Fiber Crib and Toddler Mattress

Our pick:

Evolur Sleep Comfort Lite Plus Crib and Toddler Mattress

Features: Dual-sided, hypoallergenic, Greenguard Gold certified.

FAQS:

1. What should I look for when buying a crib mattress?

When buying a crib mattress, prioritize size, firmness, material, and safety certifications. Ensure the mattress fits snugly in the crib without any gaps. Choose a firm mattress to reduce the risk of suffocation and SIDS. Look for eco-friendly and hypoallergenic options, such as Greenguard Gold certified products, to ensure your baby’s safety.

2. How do I know if the crib mattress is firm enough?

Use the Hand Press Test to check firmness. Press your hand into the mattress and release. If the mattress quickly returns to its original shape without leaving a depression, it’s firm enough. If it leaves a mark or doesn’t bounce back, it’s too soft for your baby.

3. Can I use a crib mattress for both infants and toddlers?

Yes! Many crib mattresses are dual-sided, offering a firmer side for infants and a cushioned side for toddlers. This feature allows the mattress to grow with your baby, providing comfort and support at every stage. Look for mattresses with this dual functionality for long-term use.

4. How important is it to get a mattress with a waterproof cover?

A waterproof cover is crucial to protect the mattress from spills, accidents, and leaks. Many crib mattresses come with a built-in waterproof cover, or you can purchase a separate cover to keep the mattress clean and hygienic. It’s an essential feature for maintaining the longevity of the mattress.

5. Are Greenguard Gold certified mattresses safer for my baby?

Yes! Greenguard Gold certification means the mattress has been tested for over 10,000 chemicals and harmful VOCs (volatile organic compounds), ensuring it’s free of toxic substances. This certification is vital for ensuring your baby’s sleep environment is safe and healthy.

Ready to Choose?

Choosing the right crib mattress is an important decision, one that will affect your baby’s comfort and safety. With the right information and a focus on safety, you can find a mattress that works for you and your baby’s needs.

At Ever & Ever, we believe in providing parents with the best products to support your parenting journey. Explore our curated selection of Dream On Me and Evolur crib mattresses and create a safe, cozy sleep environment for your little one.

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