Firmness & Sleep position


  • Firm
  • Medium
  • Soft
  • Ultra firm
  • Ultra soft
Medium Graphic

Sleeping position

  • Back and Front
  • Multiple
  • Side
Multiple Graphic


The Beautyrest Harmony Lux Carbon Eternal Mattress features new innovations in support, comfort, and cooling working together in harmony to unlock your best sleep. It is 13.5″ thick. Also, this mattress is ideal for multiple sleeping positions. You’ll have a cool, comfortable sleep thanks to the Infinicool lux technology. For instance, this technology provides a cool sleep environment, including a cool-to-the-touch sleep surface, to help you fall asleep and stay asleep.

The Beautyrest Harmony Lux Carbon Eternal Medium Pillow Top Mattress has Advanced Pressure Relief. Beautyrest uses RightTemp Wave Foam which features ultra-strong, highly conductive carbon fibres for a consistently supportive feel and cool sleep, night after night.

Beautyrest has also expanded their partnership with SEAQUAL™ to offer their unique sustainable fabric technologies within each Beautyrest Harmony mattress. Seaqual is a leader in ocean plastic recovery and upcycling efforts, and together this partnership will help promote cleaner oceans with every mattress sold.

As well, it is adjustable base friendly.

Simmons/ Beautyrest is proud to provide better sleep around the world in more than 100 countries since 1870.

As Beautyrest says “You Earned a First Class Sleep!”

Enjoy our 10 Year Warranty.

— — —

Looking for more information, but not sure where to start? Simply contact one of our sleep experts, or browse through our other Simmons mattresses. In addition, take our Sleep Quiz to find the perfect mattress.

Discover Beautyrest

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Product Specs & Features

  • Infinicool Lux Technology
  • Advanced Pressure Relief
  • Righttemp Wave Foam
  • Exclusive Beautytech Firm Gel Foam
  • Beautyrest Gel Foam
  • Precision Support System
  • Powered by T2 Pocketed Coil Technology
  • Dual-stranded coil design
  • 10 year full warranty

Comfort exchange

As your sleep experts, we want to ensure your mattress is as comfortable and supportive as possible for years to come which is why we offer a 30-day comfort trial with your purchase. If you’re not fully satisfied with your selection, simply arrange to come back in-store within 30 days to choose a new mattress at an equal or greater value, hassle free. Contact us for details.

We allow one exchange per customer. A minimum $65 fee for delivery is applicable for the exchange.


We strive to make the process of purchasing a new mattress as smooth as possible. If you purchase a mattress set valued over $499, we’ll deliver it absolutely free of charge. In addition to our store locations, we also deliver to Burnaby, Delta, Coquitlam, Surrey, White Rock, Maple Ridge and Mission. For a fee we can arrange delivery to Squamish, Whistler, and Chilliwack. Contact us for details. Better yet, if you purchase any bed frame from us along with your new mattress set, we’ll also install it for you at no charge. Before you know it, you’ll be having the sleep of your dreams.

Reviews (1)

1 review for Beautyrest Harmony Lux Carbon Eternal Mattress

  1. 5 out of 5


    This Eternal Mattress from Beautyrest fits perfectly on my new adjustable base. Thanks for the quick and easy delivery, Sleep Shop.

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Beautyrest Harmony Lux Carbon Eternal Mattress


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