Kolcraft is a family-owned and operated company, a premier crib mattress manufacturer that parents have depended on for decades. The Kolcraft Baby "Dri" Crib Mattress and Toddler Mattress offers 80 durability tested, extra firm posture supportive coils that respond to baby's movement. Thick and airy cushioning provide support and comfort all around. Hypoallergenic materials, no added flame retardants. A reinforced waterproof surface protects baby's mattress inside and out. Cleans easily with a damp cloth. An airflow pocket allows the mattress to safely breathe without metal vent holes, an original Kolcraft design. Tested for safety including GREENGUARD GOLD Air Quality Certified to help ensure a healthier sleeping environment for babies, and the GOLD standard is a stringent test for children's products. There are no added flame retardants and it passes CPSIA testing. Made without lead or harsh phthalates. Passes ASTM crib mattress standards for safety and quality including firmness, fit and durability. Fits U.S. standard cribs and toddler beds so you can pair it with your favorite crib. Dependable and affordable crib mattress. Measures 51.63L x 27.25W x 5H inches for a perfect fit in baby cribs and toddler beds.