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Simmons® Beautyrest® Harmony Lux™ Diamond Series Wrapped Coil Pillow Top Plush Queen Mattress

Model #: 800915899-1050
At a Glance
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.
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Mattress Size










Twin XL

Twin XL


Get to know this product.

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.


  • Seaqual™ Sustainable Fabric

Comfort Layers

  • InfiniCool™ Lux
  • SurfaceTouch™ Gel Memory Foam
  • RightTemp™ Wave Foam
  • GelTouch® Foam
  • Beautyrest® Gel Foam
  • Micro Diamond™ Memory Foam
  • Beautyrest® Comfort Foam

Support System

  • Powered by T2 Wrapped Coil™ Technology

Exclusive Support

Our Precision Support System™ powered by T2 Wrapped Coil™ Technology provides additional support where you need it most.

Sustainable and Cool Sleeping

InfiniCool™ Lux provides a cool sleep environment and Seaqual™ Fabric Technology utilizes recovered plastics from the ocean to create a durable and luxurious fabric.

Pressure Relieving Comfort

SurfaceTouch™ Gel Memory Foam, Dynamic Response™ Memory Foam, and Micro Diamond™ Memory Foam work together to deliver incredible pressure relief.


We use only CertiPUR-US® certified foams in all of our products, which means our foams are made without formaldehyde, flame retardants, prohibited phthalates, and heavy metals, as well as meet low-VOC standards for indoor air quality.

Frame Compatibility

Your new Beautyrest® mattress will work with most frames, foundations, and adjustable bases. Your mattress needs a box spring, or other solid surface, or the frame should have included slats that are no more than 2 inches apart from one another.

*Mattress only, all other products sold separately. Images may not depict actual size.


Misc. Specs

CollectionBeautyrest® Harmony Lux™ Diamond Series