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Sierra Sleep® By Ashley® Millennium Hybrid Luxury Plush Queen Mattress in a Box

Model #: M50831
Sierra Sleep
At a Glance
When it comes to your comfort, discover the luxury of this hybrid plush mattress. A layer of cooling gel latex and two layers of temperature-regulating material keep you at a comfortable temperature all night long. Copper-infused memory foam contributes to the cooling performance, and a green tea-infused support foam base keeps your mattress fresh. Contouring comfort foam conforms to your body, delivering amazing support, pressure relief and comfort. In addition, the premium pressure-sensitive NanoCoil unit and individually wrapped coil pack help to provide a great night's sleep.
$1,329.99Save $NaN
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Protection Plans

Complete Mattress 10 Year Protection Plan


x 1

Get to know this product.

  • 2 layers of phase change material (PCM)
  • 2" copper-infused cooling memory foam; 3" sculpted body-contouring comfort foam
  • Green tea-infused support foam base
  • Premium pressure-sensitive NanoCoil unit; individually wrapped coil pack
  • 4-way stretch knit cover
  • Adjustable base compatible
  • Foundation/box spring sold separately
  • Mattress ships in a box; please allow 48 hours for your mattress to fully expand after opening

Note: Purchasing mattress and foundation from two different brands may void warranty; see warranty for details

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


Misc. Specs

Height (in.)15
Made InUSA
Mattress SizeQueen
Width (in.)59
Length (in.)79
Double Sided MattressNo
Manufacturer Warranty10 Year
Age GroupAdult
Color Finish NameWhite
Mattress Comfort LevelPlush
Shipping Width (in.)15
Shipping Height (in.)65
Shipping Depth (in.)15
Mattress ConstructionHybrid
WarningProposition 65 Warning for California Residents