GREENGUARD GOLD CERTIFIED: This product has undergone rigorous scientific testing for over 10,000 chemical emissions and VOCs. It contributes to cleaner indoor air, creating a healthier environment for your baby to sleep, play, and grow GROWS WITH BABY: Four adjustable mattress positions that can be lowered as your baby begins to sit and stand. Easily converts to toddler bed, daybed, and full-size bed (toddler conversion kit No.M11999 and full-size conversion kit No.M5789 sold separately) ADDITIONAL STORAGE: Spacious trundle drawer to fit all the crib sheets, baby blankies and more FOR YOUR BABY'S SAFETY: Say goodbye to toxic chemicals Made of solid sustainable New Zealand pine and TSCA compliant engineered wood. Finished in a non-toxic multi-step painting process and lead and phthalate safe COMPLETE THE LOOK: Shop Colby 3-Drawer Dresser & 6-Drawer Dresser for a coordinated nursery. While this crib is a standard size regular crib, for a best fit we recommend DaVinci's line of non-toxic, GREENGUARD gold mattresses