The Fisher-Price Hello Rainbow Full-Size Crib Mattress is designed to deliver comfort, safety, and durability for infants and toddlers. Its sturdy innerspring core, built with metal springs and polyester fiber filling, provides firm, even support essential for healthy sleep. The waterproof vinyl cover protects the mattress from spills and accidents, allowing quick and easy cleaning while preserving long-term quality. Tested to flammability standards, this mattress gives parents peace of mind with an added layer of safety. With standard full-size dimensions of 51" × 27" × 5.5", it fits securely in most cribs and toddler beds, making it a reliable and practical choice for everyday use in any nursery.