GREENGUARD Gold Certified: This product has been tested for over 10,000 chemicals and pass the most stringent emission standards. They help improve indoor air quality, creating a healthier environment for your baby to sleep, play and thrive. DaVinci is one of very few brands that offer this certificationGROWS WITH BABY: Four adjustable mattress positions that can be lowered as your baby begins to sit and stand. Easily converts to a daybed and twin-size bed (twin-size kit #M5789 sold separately)SPACE EFFICIENT: A mini crib is a great alternative for smaller spaces or to store at grandparents' house. It's also a great alternative to a bassinet or pack n' play for co-sleeping with baby. Fold up your crib or move it around as you please -this mini crib does it all!FOR YOUR BABY'S SAFETY: Say goodbye to toxic chemicals! Finished in a non-toxic multi-step painting process and lead and phthalate safe. Rest assured knowing it exceeds ASTM International and U.S. CPSC safety standards.MATTRESS COMPATIBILITY: While this crib fits any standard size mini crib mattress, it best fits with DaVinci’s line of firm comfort, GREENGUARD gold, waterproof mini mattresses.