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Custom Order

Sierra Sleep® By Ashley Ultra Luxury Hybrid Euro Top Plush California King Mattress in a Box

Model #: M57251
Sierra Sleep
At a Glance

Enjoy endless possibilities for restful sleep on the Ultra Luxury pillow top mattress with hyper-cool technology. You get the best of both worlds with this hybrid innerspring mattress: the pressure relief of cooling gel-infused memory foam, coupled with body contouring pocketed coils for superior support.

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$2,969.99Save $730.00

Custom order times vary and

cannot be guaranteed.

Get to know this product.

Rest assured that high-density quilt foam provides the comforting feel you love. Plus, this mattress arrives in a box for quick, easy setup. Just cut away the plastic wrap and unroll it. Foundation/box spring available, sold separately.


  • Luxury loft fiber
  • 2" plush quilt foam
  • 2" cooling gel memory foam
  • 3" cushion firm support foam
  • 1" base support foam
  • Pocketed coils
  • Hyper cool luxury 4-way knit cover
  • Flame-retardant polyester comfort fiber
  • Adjustable base compatible
  • Foundation/box spring sold separately
  • Mattress conveniently arrives in a box (compressed, rolled and plastic wrapped); please allow at least 48 hours for full expansion

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


Misc. Specs

Product Weight (lbs.)135
Height (in.)16.25
Mattress SizeCalifornia King
Width (in.)71
Weight Kilogram313
Length (in.)83
Double Sided MattressNo
Manufacturer Warranty10 Year
Age GroupAdult
Color Finish NameGray
Mattress Comfort LevelPlush
Shipping Width (in.)15
Shipping Height (in.)83
Shipping Depth (in.)15
CollectionUltra Luxury
Height (cm)41
Width (cm)180
Product Weight (kg)298
Length (cm)211
Shipping Width (cm)38
Shipping Height (cm)211
Shipping Depth (cm)38
Mattress TopEuro Top
Mattress ConstructionHybrid