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Sleepy's
Sleepy's by Sealy 8 inch Firm Twin Memory Foam Mattress in a Box

Sleepy's by Sealy 8 inch Firm Twin Memory Foam Mattress in a Box

4(301 ratings)

Best price now

$269.99at Mattress FirmChecked 2 h ago

Compared across 2 stores. Prices are checked against each store and labelled with when. Store links may earn us a commission. Price via Klarna.

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Price facts

  • Lowest price today: $269.99 at Mattress Firm (checked Nov 11, 2026).
  • Checked at 2 stores.

Our take on the Sleepy's by Sealy 8 inch Firm Twin Memory Foam Mattress in a Box

The Sleepy's by Sealy 8 Inch Firm is a gel memory foam mattress sold as a twin, shipped rolled in a box. It is built for a firm feel, with gel foam that contours to the body to ease pressure points and dense foam that limits motion transfer between sleepers. It suits back and stomach sleepers and anyone who wants a firm, supportive surface without a spring mattress. Against softer all-foam rivals it trades plushness for support, and owners who want a very soft bed often find it too hard.

Best forBack and stomach sleepersCouples who want less motion transferShoppers who prefer a firm bedGuest rooms and adjustable bases
Pros
  • Firm support aimed at back and stomach sleepers
  • Gel memory foam contours to pressure points
  • Motion isolation limits partner disturbance
  • Ships rolled in a box for easy setup
  • Works on an adjustable base
Cons
  • Too firm for some sleepers
  • Thin 8-inch profile leaves little cushioning
  • Twin size only, so no shared-bed option here
  • Some buyers report delivery problems

Sleepy's by Sealy 8 inch Firm Twin Memory Foam Mattress in a Box prices at every store

  • Mattress FirmNew

    In stock

    $269.99Free shippingChecked 2 h ago
    Visit Mattress Firm
  • Mattress FirmNew

    In stock

    $299.99Checked 2 h ago
    Visit Mattress Firm

Store links may earn us a commission. Some prices via Klarna.

Sleepy's by Sealy 8 inch Firm Twin Memory Foam Mattress in a Box price history

Lowest price we've seen: $269.99 on Nov 11 at Mattress Firm. Tracked across 2 stores since Nov 11.

What reviewers say

  • 4 / 5301 ratings

Rated 4 out of 5 from 301 ratings, the mattress draws praise for firm support, comfort and motion isolation at a low cost. The main complaint is that it is too firm for some sleepers.

What people mention
  • FirmnessMixedMany back and stomach sleepers like the firm feel, but others find it too hard.
  • ComfortPraisedBuyers report better sleep and waking up refreshed.
  • Motion isolationPraisedCouples say movement on one side barely carries to the other.
  • ValuePraisedOwners call it a strong buy for the money.

From Mattress Firm

  • Firm gel memory foam comfort with pressure relief and motion isolation
  • Cradling gel memory foam contours to the body to ease pressure points
  • Excellent motion isolation reduces partner disturbance
  • Firm support for aches and pains; ideal for back and stomach sleepers
  • Arrives as a mattress in a box for easy unbox and setup
  • Adjustable base friendly
Sizes
Twin, Twin XL, Full, Queen, King
Materials
Quilting layer: stretch knit cover; comfort layer: 2" memory foam; support system: 6" support foam
Fit
Firm feel; 8 inch height; twin measures 39" W x 75" L
Sizing
New mattresses may feel firmer than the showroom model; allow 30–60 days for the mattress and body to adjust. A box spring is recommended for support.
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
Packs
Add a second Twin XL mattress in cart to build a Split King set
In the box
Mattress in a box, Included setup instructions

About the Sleepy's by Sealy 8 inch Firm Twin Memory Foam Mattress in a Box

This 8-inch twin mattress uses gel memory foam for a firm feel. The foam contours to the body to ease pressure points, and it isolates motion to reduce disturbance from a sleeping partner. The firm support is meant for back and stomach sleepers.

The mattress has a stretch knit cover over a 2-inch memory foam comfort layer and a 6-inch support foam base. It arrives in a box and comes with setup instructions. It works with an adjustable base.

A new mattress may feel firmer than the showroom model. Allow 30 to 60 days for the mattress and your body to adjust. A box spring is recommended for support.

Size
Twin, 39" W x 75" L
Height
8 inches
Type
Gel memory foam
Firmness
Firm
Sleeper type
Back and stomach
Cover
Stretch knit
Comfort layer
2" memory foam
Support layer
6" support foam
Base
Adjustable base friendly; box spring recommended for support
Care
Rotate end-to-end at 2 weeks, then every 2-3 months. Use a waterproof mattress protector to avoid stains. Carton the mattress and transport it on its side.
In the box
Mattress in a box, setup instructions

What buyers say

Buyers like
  • Exceptional comfort and improved sleep quality
  • Restful nights and waking refreshed
  • Firm support appeals to side and back sleepers
  • Excellent value for the price
  • Great for couples due to motion isolation
  • Good match for those wanting a firmer feel
Buyers complain about
  • Too firm for some sleepers
  • Some customers did not receive their mattresses
  • Difficulty reaching customer support

Specifications

Size
Twin
Type
Gel Memory Foam
Firmness
FIRM COMFORT
Sleeper Type
Back and Stomach

Questions and answers

Is this mattress good for side sleepers?
It is firm, so side sleepers who need cushioning at the shoulder and hip may find it too hard. Some side sleepers in the reviews like it, but back and stomach sleepers are the better match.
How firm is it really?
It is a firm mattress, not medium-firm. The gel memory foam softens slightly under body heat, but the support layer stays stiff.
Does it work on an adjustable base?
Yes. It is listed as adjustable base friendly, so it can be used on a power base.
How thick is it?
It is 8 inches thick, which is thinner than most foam mattresses. Heavier sleepers may want more depth.
Does it come in other sizes?
This listing is the twin size. Check the brand's other listings for full, queen and king.
What is in the box?
The mattress arrives rolled and compressed in a box, with setup instructions included.
Where is the Sleepy's by Sealy 8 inch Firm Twin Memory Foam Mattress in a Box cheapest?
At Mattress Firm, for $269.99, as of our latest check.
What do buyers say about the Sleepy's by Sealy 8 inch Firm Twin Memory Foam Mattress in a Box?
Rated 4 out of 5 from 301 ratings. Buyers like: Exceptional comfort and improved sleep quality; Restful nights and waking refreshed; Firm support appeals to side and back sleepers. Common complaints: Too firm for some sleepers; Some customers did not receive their mattresses.

Stores we've priced the Sleepy's by Sealy 8 inch Firm Twin Memory Foam Mattress in a Box at

  • Mattress Firm deals and prices

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