The Graco 6 Inch Dual-Comfort Baby Crib and Toddler Mattress was designed to grow with your baby. Featuring 2 sides, this mattress will comfort and support your child from the infant stage to the toddler stage. The smooth, firm side is recommended for the infant stage, while the convoluted side is recommended for the toddler stage. This mattress' removable outer cover is made from an ultra-soft viscose-polyester blend material and is water-resistant, ensuring that your child's sleep environment is comfortable and dry. In addition, this mattress' removable outer cover is hand-washable: simply unzip the outer cover, hand wash in cold water with mild soap (no bleach), and line dry to keep your child's sleep environment fresh, clean, and cozy. This mattress is a safe choice, as it complies with all applicable ASTM and CPSC safety and flammability standards. This mattress is designed to fit any standard full-size crib and toddler bed: length (52 inches) x width (28 inches) x height (6 inches); weight (12 pounds). This mattress is made of polyurethane foam. Graco mattresses are exclusively manufactured by Storkcraft. For over 70 years, Storkcraft has been manufacturing quality furniture for infants, toddlers, kids, and teens. Compare Storkcraft's line of innovative products to those from Delta Children, Dream on Me, DaVinci, Babyletto, or Fisher Price.