Is this mattress good for side sleepers?

It is firm, so side sleepers who need pressure relief at the hips and shoulders may find it hard. Back and stomach sleepers usually do better on it.

Will it work in a sofa bed?

Yes. The 6-inch twin size is made for sofa beds and convertible frames, and it keeps the folded bed thin enough to close.

How long does it take to expand?

Memory foam usually needs a day or two to reach full height after unrolling. It may sleep a little firm at first.

Can I use it as an everyday mattress?

It suits occasional and guest use best. For nightly sleeping by adults, a thicker mattress gives more cushioning and lasts longer.

Does it need a box spring?

A solid or slatted base is enough. On sofa beds, use the frame's own platform rather than adding a box spring.

Is it hot to sleep on?

Memory foam can trap heat. The thin build helps a little, but hot sleepers may still notice warmth.

Where is the Nightynight Firm Memory Foam Mattress cheapest?

At Walmart, for $89.98, as of our latest check.

What do buyers say about the Nightynight Firm Memory Foam Mattress?

Rated 4.7 out of 5 from 77 ratings.

Nightynight Firm Memory Foam Mattress

Best price now

$89.98at WalmartChecked 1 h ago

Prices are checked against each store and labelled with when.

Visit Walmart

Nightynight Firm Memory Foam Mattress

Best price now

$89.98at WalmartChecked 1 h ago

Prices are checked against each store and labelled with when.

Visit Walmart

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Price facts

Lowest price today: $89.98 at Walmart (checked Nov 11, 2026).

Our take on the Nightynight Firm Memory Foam Mattress

The Nightynight Firm Memory Foam Mattress is a 6-inch twin mattress built for sofa beds, guest beds and tight spaces. The firm memory foam surface is meant to hold its shape under sleepers who want support rather than sink. At 6 inches it is thinner than most standard mattresses, so it suits occasional or light use better than nightly sleeping for heavy adults. Owners rate it well overall, though the firmness and thin profile are the main points of debate.

Best forSofa beds and convertible framesGuest rooms and occasional sleepersKids' rooms and bunk setupsBack and stomach sleepers who want a firm surface

Pros

Firm memory foam gives steady support with little sink
6-inch profile fits sofa beds and low frames
Twin size suits tight rooms and bunks
Memory foam dampens motion between sleepers
Simple setup: unroll and let it expand

Cons

Thin 6-inch build offers little cushioning for heavy adults
Firm feel is too hard for side sleepers who want pressure relief
May not fully expand or may feel flat at the edges
Not built for nightly use over many years

Nightynight Firm Memory Foam Mattress prices at every store

WalmartNew
In stockSold by NightyNight
$89.98Checked 1 h ago
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Nightynight Firm Memory Foam Mattress price history

Lowest price we've seen: $89.98 on Nov 11 at Walmart. Tracked across 1 store since Nov 11.

What reviewers say

4.7 / 577 ratings

Owners give it strong marks, with most praising the firm support and the fit in sofa beds and guest rooms. The common complaints are that it feels hard and that the thin profile is not enough for everyday sleeping.

What people mention

FirmnessMixedSome sleepers like the firm support; others find it too hard, especially side sleepers.
ThicknessCriticisedThe 6-inch build feels thin to heavier adults and on longer overnight use.
FitPraisedOwners say it fits sofa beds and guest frames where a full mattress will not.
SupportPraisedReviewers report it holds its shape and does not sag much with occasional use.
Edge supportCriticisedThe edges feel softer and less supportive than the middle.

Specifications

Size: Twin
Specialty Style: Sofa Bed
Thickness: 6 in

Questions and answers

Is this mattress good for side sleepers?: It is firm, so side sleepers who need pressure relief at the hips and shoulders may find it hard. Back and stomach sleepers usually do better on it.
Will it work in a sofa bed?: Yes. The 6-inch twin size is made for sofa beds and convertible frames, and it keeps the folded bed thin enough to close.
How long does it take to expand?: Memory foam usually needs a day or two to reach full height after unrolling. It may sleep a little firm at first.
Can I use it as an everyday mattress?: It suits occasional and guest use best. For nightly sleeping by adults, a thicker mattress gives more cushioning and lasts longer.
Does it need a box spring?: A solid or slatted base is enough. On sofa beds, use the frame's own platform rather than adding a box spring.
Is it hot to sleep on?: Memory foam can trap heat. The thin build helps a little, but hot sleepers may still notice warmth.
Where is the Nightynight Firm Memory Foam Mattress cheapest?: At Walmart, for $89.98, as of our latest check.
What do buyers say about the Nightynight Firm Memory Foam Mattress?: Rated 4.7 out of 5 from 77 ratings.

Stores we've priced the Nightynight Firm Memory Foam Mattress at

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