Polyurethane Foam OEKO-TEX STANDARD 100 CERTIFIED, GREENGUARD GOLD CERTIFIED, UL FORMALDEHYDE FREE VALIDATED: Our award-winning crib and toddler mattress features a OEKO-TEX Standard 100 certified cover, ensuring it's tested for harmful substances. The full mattress is GREENGUARD Gold certified and UL Validated Formaldehyde Free, helping create a healthier indoor environment for your little one CERTIPUR-US CERTIFIED, BABY SAFETY ALLIANCE VERIFIED, FIBERGLASS FREE: Baby mattress core meets CertiPUR-US program standards for content, emissions and durability; Baby Safety Alliance Verified for safer sleep; Free of fiberglass and chemical flame retardants PREMIUM, WATERPROOF MATTRESS COVER: Premium, ultra-soft (for a quieter sleep for your baby) outer mattress cover with a waterproof sleep surface; Crib mattress cover is machine-washable for easy care; Our toddler mattress is backed by a 10-year limited warranty FITS ALL STANDARD FULL-SIZE BABY CRIBS & TODDLER BEDS: Designed to fit any standard full-size baby crib and toddler bed (52 in x 28 in); For optimal performance, open box immediately upon delivery and allow mattress to expand fully for up to 48 hours PAIR WITH GRACO MATTRESS PROTECTOR: For the perfect pair, complete your Graco crib mattress with the matching Graco Premium Waterproof Crib & Toddler Mattress Protector (available in 1-pack and 2-pack options), which is also GREENGUARD Gold Certified