Introducing the Graco Premium Foam Crib & Toddler Mattress America''s #1 Crib Mattress (• Based on dollars sold, according to 2019-2022 market data compiled by The NPD Group). GREENGUARD Gold Certified, Formaldehyde Free Certified by UL, JPMA Certified, and with a CertiPUR-US Certified foam core. Proud recipient of the 2023 Top Product Award by Parent Tested Parent Approved (PTPA), the PTPA Seal of Approval, the 2020-2023 Women''s Choice Award for 9 out of 10 Customer Recommended Crib & Toddler Mattress and National Parenting Product Awards (NAPPA) winner. Features a removable, comfortably soft mattress cover with a waterproof sleep surface. For easier care, this zip-off mattress cover is machine-washable (machine wash in cold water on delicate cycle, hang to dry do not place in dryer machine). The mattress foam core is perforated to allow for increased air flow without compromising on firmness. For optimal performance, unbox and allow your mattress to fully expand in a room temperature setting immediately upon delivery. Fits any standard full-size crib or toddler bed. Dimensions: Length (52.00 inches) x Width (28.00 inches) x Height (up to 4.5 inches); Weight (7 pounds). Mattress core (100% polyurethane foam). Mattress cover (100% polyester). Backed by a 10-year limited manufacturer''s warranty. Exclusively manufactured by Stork Craft Manufacturing (USA) Inc. (Mattress Protector Included)