The Union 4-in-1 convertible crib is a durable and chic staple for the modern nursery. With fixed side rails, non-toxic lead and phthalate-safe finish, and sturdy construction from sustainable New Zealand pine, the Union crib is a safe place for baby to rest easily. The Union crib converts to a day bed and toddler bed (with conversion kit, sold separately), and takes a standard size crib mattress (sold separately). Meets ASTM international and US CPSC safety standards for the utmost safety.