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Sleep 12 Inch King Size Hybrid Mattress in a Box

Sleep 12 Inch King Size Hybrid Mattress in a Box

Best price now

$229.99at AmazonObserved Nov 3, 2026, 10:47 AM

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Our take on the Sleep 12 Inch King Size Hybrid Mattress in a Box

The Sleep 12 Inch Hybrid is a king-size mattress-in-a-box that pairs 899 pocketed coils with foam layers for a medium-firm feel. It ships compressed in a box and works with adjustable bed bases. The 10-year limited non-prorated warranty is longer than most budget hybrids offer. At $229.99 at Amazon as of November 4, 2026, it sits at the low end of what a king hybrid typically costs.

Best forShoppers who want a king hybrid on a tight budgetBack and stomach sleepers who like a firmer feel
Guest rooms and rentals
Buyers using an adjustable base
Pros
  • 899 pocketed coils give more support than an all-foam boxed mattress
  • 12-inch profile fits standard deep-pocket sheets
  • Works with adjustable bed bases
  • 10-year non-prorated warranty
  • King size at a low price
Cons
  • Medium-firm feel won't suit shoppers who want a plush mattress
  • Spot clean only; no removable, washable cover
  • No sleep trial or returns stated beyond the seller's policy
  • Coil mattresses can transfer motion between sleepers
  • Edge support on budget hybrids is often soft

Sleep 12 Inch King Size Hybrid Mattress in a Box prices at every store

  • AmazonNew

    Availability unknown

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    $229.99Free shippingObserved Nov 3, 2026, 10:47 AM
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Sleep 12 Inch King Size Hybrid Mattress in a Box price history

Lowest price we've seen: $229.99 on Nov 3 at Amazon. Tracked across 1 store since Nov 3.

Specifications

Coil Count
899 CoilsSource
Mattress Size
KingSource
Warranty
10-year limited non-proratedSource
Adjustable Base Compatible
Compatible with Adjustable Bed BaseSource
Care
Spot clean onlySource

Questions and answers

Is the Sleep 12 Inch Hybrid good for side sleepers?
It is medium-firm, which many side sleepers find too firm at the shoulder and hip. Side sleepers under about 150 pounds usually do better on a softer mattress or with a foam topper.
How firm is it?
Expect a medium-firm feel, roughly 6 to 7 out of 10. The coil core adds pushback, so it feels firmer than most all-foam mattresses in a box.
Does it work with an adjustable base?
Yes. Sleep lists it as compatible with adjustable bed bases, and the 12-inch profile bends without issue.
How long does it take to expand after unboxing?
Most hybrid mattresses in a box reach full height within 24 to 48 hours. Sleep through the first night is fine, but give it two days before judging the firmness.
Is $229.99 a good price for a king hybrid?
Yes. That is well below typical king hybrid pricing, and Amazon is the only store listing it new as of November 4, 2026, so there is no cheaper option to compare against.
What is the warranty?
A 10-year limited non-prorated warranty covers manufacturing defects. It does not cover normal softening or stains, and the cover is spot clean only.
Where is the Sleep 12 Inch King Size Hybrid Mattress in a Box cheapest?
At Amazon, for $229.99, as of our latest check.

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