The BeautySleep® firm bunk mattress sets the stage for a better night's sleep, providing both the comfort and support growing kids need. Its combination of soft and adaptive firm foam helps it conform to kids' bodies and relieve pressure points through the night. At the same time, it has a bounce-back quality that helps children sink into their dreams—not the mattress. Its ClimateCool™ cover wicks away heat and enhances breathability, keeping kids comfortable even on warm nights. At 7.5" thick, it's perfectly sized for Crate & Kids bunk beds.