Every crib and toddler bed needs a mattress, and the Graco Crib and Toddler Mattress-in-a-Box is the perfect addition to complete your crib. Designed to fit any standard full-size crib or toddler bed, the Graco Crib and Toddler Mattress-in-a-Box is GREENGUARD Gold Certified, has a CertiPUR-US Certified foam core, and is certified by the Juvenile Products Manufacturers Association (JPMA). This award-winning mattress is the proud recipient of the Parent Tested Parent Approved (PTPA) Seal of Approval, 2021 & 2022 Women's Choice Award for 9 out of 10 Customer Recommended Crib and Toddler Mattress, the National Parenting Product Award (NAPPA), and the 2021 JPMA Innovation Award for the “Tried and True” category.  The mattress has a firm, breathable foam mattress core that is the recommended firmness for infants’ safer sleep. For optimal performance, we recommend that you carefully unbox your mattress and allow it to expand immediately upon delivery to allow maximum time for its full expansion, in a room temperature setting. Features: -Exclusively manufactured by Stork Craft Manufacturing (USA) Inc. -GREENGUARD Gold Certified: Certified products are screened for more than 10,000 chemicals and VOCs known to pollute indoor air -CertiPUR-US Certified Foam: Certified flexible polyurethane foams meet CertiPUR-US program standards for content, emissions and durability, and are analyzed by independent, accredited testing laboratories -JPMA Certified: Expert-tested by independent, accredited laboratories to meet the highest standards for your child's safety -Machine-washable, water-resistant outer cover: Features a soft, removable, water-resistant outer cover that can be machine washed. To wash the mattress outer cover, gently unzip the mattress outer cover, machine wash in cold water (delicate cycle, no bleach), and hang to dry (do not place in dryer machine) -Breathable, firm foam mattress core: Breathable foam core is recommended firmness for infants’ safer sleep. Mattress core made of polyurethane foam. For optimal performance, please allow mattress to expand immediately upon delivery in a room temperature setting to allow maximum time for full expansion. -Award-winning crib & toddler mattress: Parent Tested Parent Approved (PTPA) Seal of Approval, 2022 Women's Choice Award for 9 out of 10 Customer Recommended Crib and Toddler Mattress, -National Parenting Product Award, and 2021 JPMA Innovation Award for the "Tried and True" category -Mattress dimensions: Length (52 inches) x Width (27.6 inches) x Height (up to 5 inches) x Weight (7 pounds). Designed to fit any standard full-size crib or toddler bed. -Backed by a 6-year limited manufacturer’s warranty -Mattress outer cover made of 100% polyester material Boxed dimensions: 30 x 10 x 9.75 inches *Please allow at least 72 hours for the mattress to expand to its full size (actual expansion time may vary)