Untreated wood, used newborn to 6 months, excellent condition. Extremely sturdy! Comes with the full kit — Classic Wave mattress pad, Dry Comfort mattress protector, and a double pack of jersey sheets. The babybay attaches securely to your bed frame as a co-sleeper / bedside sleeper, so baby is within arm's reach all night without bedsharing. Great for breastfeeding moms, C-section recovery, or anyone doing dream feeds.