The Concord Baby Sara 4-in-1 Convertible Crib and bonus Twinkle Twinkle crib mattress bundle provide tremendous style and value for any nursery. One side of the mattress is firm for the first year of development while the other side is softer for toddlers 12 months and up. The foam mattress is crafted from resilient, high-quality foam with enhanced airflow and comfort. A waterproof vinyl exterior makes cleanup easy. The Concord Baby Sara crib has attractive clean lines and is versatile in growing with your child by converting to a toddler bed (toddler guard rail not included), day bed and full-size bed (full-size bed rails sold separately). The Concord Baby Sara Crib and bonus mattress provides unbeatable quality and value that will last your family for years.