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Deal.ai › Sealy › Bed Mattresses
Sealy
Sealy Sleepy's Firm Mattress King

Sealy Sleepy's Firm Mattress King

Best price now

$1,699.99at Mattress FirmChecked 4 h ago

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Price facts

  • Lowest price today: $1,699.99 at Mattress Firm (checked Nov 14, 2026).

Our take on the Sealy Sleepy's Firm Mattress King

The Sealy Sleepy's Firm is a king-size innerspring mattress built for back and stomach sleepers who want a flat, supportive surface. Individually wrapped coils cut down motion transfer, and gel foam layers add contouring and help move heat away from the body. It ships compressed in a box, so it sets up without a delivery crew. Against rival firm hybrids and all-foam beds, it leans traditional innerspring: supportive and bouncy rather than plush, with less sink-in than memory foam. Side sleepers and anyone wanting cushioning should look elsewhere.

Best forBack sleepers who want a flat, supportive surfaceStomach sleepers who need firm pushback at the hipsCouples bothered by a partner's movementShoppers who want a bed shipped in a box
Pros
  • Firm support suits back and stomach sleeping
  • Individually wrapped coils limit motion transfer
  • Gel foam adds contouring and airflow
  • Ships compressed in a box for easy setup
  • King size gives room for two sleepers
Cons
  • Too firm for most side sleepers
  • Less pressure relief than a plush or memory foam bed
  • Innerspring feel is bouncier than all-foam rivals
  • Gel foam layer is thin, so heat relief is modest

Sealy Sleepy's Firm Mattress King prices at every store

  • Mattress FirmNew

    In stock

    $1,699.99Free shippingChecked 4 h ago
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Store links may earn us a commission. Price via Klarna.

Sealy Sleepy's Firm Mattress King price history

Lowest price we've seen: $1,699.99 on Nov 14 at Mattress Firm. Tracked across 1 store since Nov 14.

What reviewers say

Owners of firm Sealy and Sleepy's mattresses generally describe a supportive, no-sink-in feel that suits back and stomach sleepers. Complaints tend to center on the firmness being too much for side sleeping and on the bed feeling less cushioned than expected.

What people mention
  • FirmnessMixedBack and stomach sleepers like the flat support, while side sleepers find it too hard.
  • Motion transferPraisedThe wrapped coils keep a partner's movement from carrying across the bed.
  • Pressure reliefCriticisedSome owners say the foam layers do not cushion shoulders and hips enough.
  • HeatMixedThe gel foam is meant to sleep cooler, but results vary by sleeper.

From Mattress Firm

  • Individually wrapped coils reduce motion transfer
  • Gel foam layers contour and relieve pressure
  • Trusted design by Sealy and Sleepy's brands
  • Conveniently ships in a box for easy setup
  • Ideal for back and stomach sleepers
  • Gel foam helps pull heat away from the body and increase airflow
Materials
Quilting layer: super soft stretch knit rayon cover, rayon fiber; comfort layer: 7/8" gel poly foam in quilt, 1.25" firm foam; support system: 6" Caliber Edge p
Fit
Firm feel with more support and less sink
Sizing
Add a second Twin XL mattress in cart to build a Split King set
Care
Rotate mattress end-to-end at 2 weeks, then every 2-3 months; use a waterproof mattress protector to avoid stains; carton the mattress and transport on its side
Guarantee
10 Year Limited warranty
Returns
120 Night Sleep Trial: if you don't love it, they'll help you find a new one or your money back
Shipping
Free shipping; delivery to your front door, side door or garage; contactless delivery; no removal of your old mattress set

About the Sealy Sleepy's Firm Mattress King

This is a firm king-size mattress from Sealy and Sleepy's. It has a firm feel with more support and less sink, and it is made for back and stomach sleepers.

The cover is a stretch knit rayon quilting layer. Beneath it, the comfort layer has 7/8" of gel poly foam in the quilt and 1.25" of firm foam. The gel foam layers contour to the body and relieve pressure. The gel foam also helps pull heat away from the body and increases airflow.

The support system uses individually wrapped coils to reduce motion transfer. The mattress ships in a box for easy setup.

Bed size
King
Comfort level
Firm
Sleeper type
Back and stomach
Cover
Super soft stretch knit rayon, rayon fiber
Comfort layer
7/8" gel poly foam in quilt, 1.25" firm foam
Support
Individually wrapped coils
Fit
Firm feel with more support and less sink
Split King
Add a second Twin XL mattress to build a Split King set
Care
Rotate end-to-end at 2 weeks, then every 2-3 months. Use a waterproof mattress protector to avoid stains.
Moving
Carton the mattress and transport it on its side

Specifications

Bed Size
KingSource
Comfort Level
FirmSource
Firmness
FIRM COMFORT
Sleeper Type
Back and Stomach

Questions and answers

Who is this mattress best for?
Sealy positions it for back and stomach sleepers who want firm support. Side sleepers usually need a softer, more contouring bed.
Is it a memory foam or innerspring mattress?
It is an innerspring bed with individually wrapped coils and gel foam layers on top. Expect a bouncier, more supportive feel than all-foam.
Does it come rolled in a box?
Yes. It ships compressed in a box, so you unbox it and let it expand in place.
Will it sleep hot?
The gel foam is designed to pull heat away and improve airflow. The effect is modest, and hot sleepers may still prefer a cooling cover.
How does it compare with a plush mattress?
It is firmer and flatter, with less sink-in. A plush model cushions pressure points more but offers less support for stomach sleeping.
Where is the Sealy Sleepy's Firm Mattress King cheapest?
At Mattress Firm, for $1,699.99, as of our latest check.

Stores we've priced the Sealy Sleepy's Firm Mattress King at

  • Mattress Firm deals and prices

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