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Deal.ai › Compare

CoolNest Memory Foam Mattress vs Sierra Sleep Limited Edition 12 Inch Plush Mattress by Ashley

Buy the CoolNest if you want an all-foam Queen with a cooler sleep surface and strong motion isolation. Buy the Sierra Sleep if you want a plush hybrid feel with wrapped coils and a quilted cover, and you sleep in a Twin XL. The CoolNest is gel memory foam with a 5-zone design and a breathable cover; the Ashley is a coil-and-foam hybrid with a 10-year non-prorated warranty. Owners of both rate them highly, and the CoolNest has far more ratings behind its score.

  • Choose the CoolNest if you want a 12-inch all-foam Queen that sleeps cooler and isolates motion for couples.
  • Choose the Sierra Sleep if you want a plush hybrid with wrapped coils, a quilted cover and a 10-year warranty, in Twin XL.

Prices

  • CoolNest Memory Foam Mattress: $312.00 at Home Depot (last seen Nov 2)
  • Sierra Sleep Limited Edition 12 Inch Plush Mattress by Ashley: $349.99 at Target (last seen Nov 10)
  • Difference: the CoolNest Memory Foam Mattress is $37.99 cheaper than the Sierra Sleep Limited Edition 12 Inch Plush Mattress by Ashley at the latest prices (Nov 2 and Nov 10)
CoolNest
CoolNest Memory Foam Mattress

CoolNest Memory Foam Mattress

4.9(721 ratings)
$312.00at Home DepotChecked Nov 2
See all prices and details
Visit Home Depot
Pros
  • Gel memory foam with a breathable 3D-weave cover
  • 5-zone support targets pressure points
  • All-foam build isolates motion well for couples
  • 12-inch Queen with a large pool of high ratings
Cons
  • No stated warranty in the listing
  • All-foam edges can soften more than coil edges over time
  • Cooling claims are the maker's own, not independently tested
Ashley
Sierra Sleep Limited Edition 12 Inch Plush Mattress by Ashley

Sierra Sleep Limited Edition 12 Inch Plush Mattress by Ashley

4.9(270 ratings)
$349.99at TargetChecked 14 h ago
See all prices and details
Visit Target
Pros
  • Plush hybrid feel with wrapped coils underneath
  • Quilted stretch-knit cover is comfortable from night one
  • 10-year non-prorated warranty
  • Adjustable base compatible and ships as a bed in a box
Cons
  • Only listed in Twin XL here
  • Plush top may be too soft for stomach sleepers
  • Coils transfer more motion than all-foam

What separates them

CoolNest Memory Foam MattressSierra Sleep Limited Edition 12 Inch Plush Mattress by Ashley
ConstructionAll-foam gel memory foamFoam comfort layers over wrapped coils
FeelContouring memory foam with 5-zone supportPlush, cloud-like tight top
CoolingCoolNest cover and breathable foam, claimed up to 8°C coolerNo cooling claims; quilted knit cover
Motion isolationAll-foam design isolates motionWrapped coils reduce transfer but not as fully
Edge supportEnhanced edge support per the makerCoils and edge support give a stable sitting edge
Size and dimensionsQueen, 80 by 76 in, 12 in thickTwin XL, 79.5 by 38 in, 13.5 in thick
WarrantyNot stated in the listing10-year non-prorated
Adjustable baseListed as adjustable-bed compatibleAdjustable base compatible

Price history

$629.99$312.00
Oct 28Nov 11
  • CoolNest Memory Foam Mattress: lowest $312.00 on Nov 2 at Home Depot.
  • Sierra Sleep Limited Edition 12 Inch Plush Mattress by Ashley: lowest $349.99 on Nov 11 at Target.

Prices at every store

CoolNest Memory Foam Mattress

  • SweetNightNew

    In stockReturn policy

    $349.99Checked 15 h ago
    Visit SweetNight
  • Home DepotNew

    Availability unknown

    $312.00Checked Nov 2
    Visit Home Depot
  • TargetNew

    Availability unknown

    $349.99Checked Nov 2
    Visit Target
  • WayfairNew

    Availability unknown

    $360.99Checked Nov 2
    Visit Wayfair
All 5 stores and price history →

Sierra Sleep Limited Edition 12 Inch Plush Mattress by Ashley

  • Cloudy MattressNew

    In stockReturn policy

    $429.00Checked Nov 9
    Visit Cloudy Mattress
  • TargetNew

    Availability unknown

    $349.99Free shippingChecked 14 h ago
    Visit Target
All 2 stores and price history →

Specs compared

SpecCoolNest Memory Foam MattressSierra Sleep Limited Edition 12 Inch Plush Mattress by Ashley
SizeQueenTwin XL
TypeGel Memory FoamMemory Foam
Width76 in wide79.5 inch(es) / 201.93 cm
Thickness12 in—
Specialty StyleAdjustable Bed—
Length80 in long—
Comfort—Plush
Top Style—Tight Top
Coil Type—Wrapped Coil
Height—13.5 inch(es) / 34.29 cm
Depth—38 inch(es) / 96.52 cm
Weight—60.21 lb(s) / 27.31 kg
Show all 13 specsShow fewer specs
SpecCoolNest Memory Foam MattressSierra Sleep Limited Edition 12 Inch Plush Mattress by Ashley
Warranty—10-year non-prorated warranty

What reviewers say

CoolNest Memory Foam Mattress

  • 4.9 / 5721 ratings

With 4.9 out of 5 from 721 ratings, buyers mostly report cooler, more comfortable sleep and less back discomfort. Couples single out motion isolation, and several call the quality good for the price.

What people mention
  • CoolingPraisedBuyers say it sleeps cooler than the memory foam they replaced.
  • Pressure reliefPraisedOwners report the foam cradles the body and reduces back discomfort.
  • Motion isolationPraisedCouples say movement on one side barely carries to the other.
  • ValuePraisedReviewers call the quality excellent for the price.

Sierra Sleep Limited Edition 12 Inch Plush Mattress by Ashley

  • 4.9 / 5270 ratings

Owners rate it very highly, with 270 ratings averaging 4.9 out of 5. The recurring praise is the soft-yet-supported feel and the easy boxed setup; complaints are few and mostly about softness for some sleepers.

What people mention
  • ComfortPraisedOwners describe a soft, plush surface that is comfortable from the first night.
  • SupportPraisedReviewers say the coil core keeps it from feeling like a sinkhole.
  • Motion transferPraisedCouples report less disturbance when one partner moves.
  • SetupPraised

Questions and answers

Which is better for couples?
The CoolNest. Its all-foam build isolates motion better than the Sierra Sleep's wrapped coils, and it comes in Queen, which most couples need.
Which sleeps cooler?
The CoolNest. It uses a breathable 3D-weave cover and gel foam with a claimed cooling effect. The Sierra Sleep makes no cooling claims and has a quilted cover.
Which lasts longer?
The Sierra Sleep has a stated 10-year non-prorated warranty, which is the clearer durability promise. The CoolNest lists no warranty, though its maker claims resistance to deformation.
Is the Sierra Sleep worth stepping up to?
Step up if you want a plush hybrid with coils and a written 10-year warranty. Stay with the CoolNest if you want all-foam motion isolation in a Queen.
Which is better for back pain?
The CoolNest's 5-zone support and contouring foam are aimed at pressure relief and back comfort, and owners report less back discomfort. The Sierra Sleep is plush, which suits side sleepers more than back sleepers.
Can both go on an adjustable base?
Yes. Both are listed as adjustable base compatible.

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