Our Simmons® RiteHeight® Bunk Bed Mattress was expertly designed to give your kids a good night's sleep in their bunk beds. All-foam technology helps to provide exceptional support and comfort, while still keeping a low profile. Cooling fibers help to maintain an ideal sleeping temperature for your little one. Above all, it's backed by the CertiPUR-US® certification, so you can rest assured the low VOC construction is safe for your child.