From the Stokke Sleepi Collection. Made of durable polyurethane foam known for its elastic and pressure-resistant qualities, this mattress provides growing children necessary support and comfort. The hypoallergenic foam has a breathable structure that evaporates moisture accumulated overnight, thus preventing fungus. In addition to being quilted on top for soft comfort, the cotton mattress cover has a mesh lining in the bottom, which combined with grooves in the mattress foam provides excellent mattress ventilation. Polyurethane Wipe clean Made in USA SPECIFICATIONS 65"L x 26.75"W x 4" D.