Dream On Me, 2 in 1 Folding Portable Crib 682, 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. Made of solid pine, this portable crib is one of the most convenient portable cribs on the market. Dream On Me Mattress Pad and all tools for easy assembly are included. Meet the CPSC and ASTM standard .