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Ashley Furniture Signature Design
Ashley Furniture Signature Design Sierra Sleep 6 Inch Twin Mattress

Ashley Furniture Signature Design Sierra Sleep 6 Inch Twin Mattress

Best price now

$159.00at wood stockObserved at 11:29 PM

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Our take on the Ashley Furniture Signature Design Sierra Sleep 6 Inch Twin Mattress

The Ashley Sierra Sleep 6 Inch is a firm foam twin mattress with a quilted 4-way stretch knit cover. Its 6-inch profile and 28-pound weight make it easy to move, and it works on an adjustable base. At $159 at wood stock as of November 4, 2026, it is the only new price listed, so there is no recent range to compare it against.

Best forKids' rooms and bunk bedsGuest rooms and spare bedsShoppers on a tight budgetBack sleepers who want a firm surface
Pros
  • Low price for a new twin mattress
  • Firm foam suits back and stomach sleepers
  • Light at 28 pounds and easy to move
  • Adjustable base compatible
  • 5-year limited warranty
Cons
  • Only 6 inches thick, so little cushioning
  • Firm foam has no pressure relief for side sleepers
  • Foam only, with no springs or edge support
  • No cooling features in the knit cover

Ashley Furniture Signature Design Sierra Sleep 6 Inch Twin Mattress prices at every store

  • wood stockNew

    In stock

    $159.00Observed at 11:29 PM
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Ashley Furniture Signature Design Sierra Sleep 6 Inch Twin Mattress price history

Lowest price we've seen: $159.00 on Nov 4 at wood stock. Tracked across 1 store since Nov 4.

From wood stock

  • Budget-friendly firm foam mattress by Ashley's Sierra Sleep line
  • 4-way stretch knit cover for a soft, inviting surface
  • Quilted cover over layers of quality foam
  • 6-inch profile
Materials
4-way stretch knit cover
Fit
Firm
Sizing
Twin size

About the Ashley Furniture Signature Design Sierra Sleep 6 Inch Twin Mattress

The Sierra Sleep Firm Mattress by Ashley offers a comfortable night’s sleep at an affordable price. This budget-friendly twin mattress features a 4-way stretch knit cover that provides a soft and inviting surface. Beneath the quilted cover, layers of quality foam enhance the level of comfort, ensuring you get the rest you need. The combination of these materials creates a supportive and comfortable mattress that balances affordability with quality. This makes the Sierra Sleep Firm Mattress a practical choice for those seeking a firm and supportive sleep surface.

Specifications

Mattress Size
TwinSource
Mattress Top
Tight TopSource
Comfort Level
FirmSource
Construction
FoamSource
Adjustable Base Compatible
YesSource
Width
38Source
Length
74.5Source
Height
6Source
Product Weight
28Source
Warranty
5 Year LimitedSource
Color
WhiteSource
Cover
4-way stretch knit coverSource

Questions and answers

Is this mattress good for side sleepers?
Probably not. At 6 inches of firm foam there is little give at the shoulder and hip, so side sleepers often feel pressure. Back and stomach sleepers are a better fit.
Does it work on an adjustable base?
Yes. Ashley lists it as adjustable base compatible, and at 28 pounds it bends easily. Check that your base's size setting matches a twin.
What are the twin dimensions?
It measures 38 inches wide by 74.5 inches long by 6 inches high. That fits a standard twin frame, bunk bed or trundle.
Is it worth it over a thicker foam mattress?
If you need a cheap, firm bed for a kid or guest room, yes. For nightly adult use, a thicker mattress with more foam layers will last longer and feel softer.
What is the warranty?
Ashley covers it with a 5-year limited warranty. Keep your receipt, since claims go through the retailer or Ashley.
When is it cheapest?
It is $159 at wood stock as of November 4, 2026, and only one store lists a new price. Watch for mattress sales around holidays and back-to-school season.
Where is the Ashley Furniture Signature Design Sierra Sleep 6 Inch Twin Mattress cheapest?
At wood stock, for $159.00, as of our latest check.

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