Simmons Kids Radiant Sky Dual Sided Crib Mattress - Waterproof Comfort

In this review of the Simmons Kids Radiant Sky Dual Sided Baby Crib Mattress and Toddler Mattress, the bottom line is simple: this mattress is aimed at parents who want a firm, safe sleep surface that is easy to maintain and made in the USA. It stands out because the foam core is plant-based soy and CertiPUR-US certified, while the soft knit cover has a waterproof backing that makes cleanup straightforward. For caregivers prioritizing safety certifications and a mattress that transitions from crib to toddler bed, this offering delivers dependable firmness and practical features without unnecessary extras.

Key Features

• Dual-sided design: Both sides feature waterproof backing so the mattress can be flipped when your child moves from crib to toddler bed without losing protection.
• Plant-based foam core: The foam uses soy-derived materials to provide a firm, supportive surface appropriate for infants and toddlers while reducing reliance on petroleum-based content.
• Waterproof knit cover: A soft 100% cotton knit cover with waterproof backing makes surface spills and diaper leaks easy to wipe clean.
• Certified low emissions: GREENGUARD Gold and CertiPUR-US certifications ensure the mattress meets indoor air quality and foam safety standards.
• Non-toxic construction: Free from added toxic fire retardants, lead and phthalates and tested to meet JPMA, CPSIA and ASTM safety standards.
• Compact shipping: The mattress ships compressed in a lightweight box and is made the day of your order for fresh performance.

Who It's For

This mattress is best for newborns through toddler age when parents want a firm, safety-focused sleep surface that also handles everyday accidents. The combination of a waterproof cotton knit cover and a firm plant-based foam core makes it particularly suitable for households that prioritize easy cleaning and low chemical emissions.

Parents looking for a plush or pillow-top feel should look elsewhere; this model is intentionally firm to meet infant safety guidelines. If you need a mattress with a fully removable, machine-washable cover or a thicker pillow surface, consider mattresses with removable encasements or additional plush layers.

Pros & Cons

Pros

• Firm, supportive plant-based foam core that suits infant safety recommendations and toddler transition.
• Waterproof 100% cotton knit cover makes cleanup quick and helps protect the interior foam.
• Multiple safety certifications (GREENGUARD Gold, CertiPUR-US, JPMA) that speak to low emissions and tested materials.
• Ships compressed in a box and is made in the USA with a 5-year limited warranty for peace of mind.

Cons

• Zipper cover is not intended to be removed, so the cover is not fully machine-washable; spot cleaning is required for most soils.

Specifications

Size	52L x 27.5W x 5H in
Cover material	100% cotton knit with waterproof backing
Core	Firm plant-based soy foam (CertiPUR-US approved)
Certifications	GREENGUARD Gold, CertiPUR-US, JPMA
Made	Made in the USA
Warranty	5-year limited warranty

Our Verdict

The Simmons Kids Radiant Sky mattress is a practical, safety-minded choice for parents who need a reliable, firm sleep surface that handles spills and meets strict certifications. It offers solid value given the plant-based foam core, waterproof cotton knit cover and multiple safety approvals, though users should be aware the cover is not intended to be removed for machine washing.

Frequently Asked Questions

How long until the mattress fully expands?
The mattress should be opened and unrolled within two weeks of purchase and may take up to 48 hours to fully expand.

Does the cover come off for washing?
The zipper cover is not intended to be removed; spot clean the waterproof knit cover as needed.

Will it fit my toddler bed?
The mattress is designed to fit any standard full-size crib and toddler bed (52 x 27.5 in).