Let your baby sleep peacefully on the Kolcraft Sealy Natural Rest crib mattress. It has innerspring coils and a heavy-gauge steel border for maximum firmness and support. Top hypoallergenic layers cushion your baby. They also provide a safe surface to sleep on. The mattress has a laminated vinyl exterior and a cotton cover for durability. The innovative airflow pocket design ensures that this hypoallergenic crib mattress stays fresh. For protection against moisture, mildew and stain, it has a waterproof cover and lock-stitched waterproof binding. The Kolcraft crib mattress can also be used in a toddler bed frame. This firm mattress can be easily cleaned with a damp cloth.