Check out the Beautyrest Harmony LUX Diamond Series Plush! Beautyrest^® Harmony Lux™ Diamond Series features our latest innovations in support, comfort, and cooling that work together in harmony for a better night’s sleep. Its new and innovative coil design and support system, advanced pressure-relieving foams, uniquely engineered cooling technologies, and exclusive sustainable fabric technology makes this collection the ultimate choice in premium bedding. Featuring our Micro Diamond™ Memory Foam, the Diamond Series is designed to conduct heat away from your body and keep you cool all night long.