Dream On Me, 2 in 1 Folding Portable Crib features US Patented rail system for ease in converting crib to playpen with one hand. The unique hinges allow the crib to fold flat for compact storage or travel. Included, is the stationary (non drop side) rail design which provides the utmost in product safety and heavy duty, locking, commercial size wheels. Made of beautiful birch, a hard, heavy, close grained hardwood and possessing a beautiful non-toxic, lead-free finish, this portable crib is one of the most convenient portable cribs on today's market. Ideal for commercial use yet compliments any nursery. A 1? mattress pad and all tools for easy assembly are included. ASTM and CPSC Certified.