It all started with the introduction of the world's Premier Sleep System: Beautyrest Pocketed Coil springs which move individually to support the natural shape of your body, and diffuse movement for a peaceful, undisturbed rest. Since then, Beautyrest has led the way in introducing a wide range of advancements that help you sleep your best - so you can Be More Awake. The Poised Slumber 12"" Medium Tight Top Mattress offers a supportive and cooling medium feel.