It's one of five available Harmony Lux Carbon Series models. Featuring our RightTemp Wave Foam, our Harmony Lux Carbon Series sleeps cool and comfortable all night. They are also taller, with the Plush Pillow Top version maxing out at a whopping 17.5". 10121 Evergreen Way, #30, Everett, WA 98204. There's also the Diamond Series, which has four models that are slightly more high-end. 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. They come in a wide range of comfort levels , from extra firm to pillow top plush. 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 Seaqual sustainable fabric technology makes this collection the ultimate choice in premium bedding. Beautyrest Harmony Lux mattresses are designed and targeted to be in the mid-range for prices ($1,099 - $1,999), with some really top-notch materials. The Harmony Lux incorporates a carbon fiber foam layer for consistent support, a layer of gel memory foam directly below the quilted sleep surface for immediate pressure relief and finally a premium memory foam layer featuring actual diamond particles to help conduct heat away from the body. 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. Beautyrest Harmony Lux Diamond Series The Diamond mattresses in the Harmony Lux line include more memory foam than those in the Carbon series. The Harmony Lux Carbon 1000 Medium Pillow Top mattress is a medium-feeling pillow top bed that is a part of the Beautyrest Harmony Lux collection of mattresses by Simmons.