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.