Check out the Beautyrest Harmony LUX Carbon Series Medium! Beautyrest® Harmony Lux™ Carbon 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 RightTemp™ Wave Foam, our Harmony Lux™ Carbon Series sleeps cool and comfortable all night.