Mattress Insider Deluxe Sofa Bed Mattress with Memory Foam

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Images: Mattress Insider. Shown size and configuration may vary.

Mattress Insider

Deluxe Sofa Bed Mattress with Memory Foam

Name: Mattress Insider Deluxe Sofa Bed Mattress with Memory Foam
Brand: Mattress Insider

Best for: Sofa beds used nightly

A 4.5″ gel memory foam sofa-bed mattress in eight sizes from 35 × 72 to 64 × 72.

Good to know: Made for sofas that take a 4–5″ mattress; thinner frames may not fold.

Type: Memory foam
Height: 4.5″
Sizes: Made to order + custom
Certified: CertiPUR-US

Your size

35 × 72 in · 4.5″ tall

Where to get it

mattressinsider.comOrder online · delivered to you Get a quote

Returns: 365-night sleep guarantee (page text) Details

We may earn a commission if you buy. Check the price for your exact size and height on the seller’s site.

The short version

Worth a look if

Sofa beds used nightly

Good

A 4.5″ gel memory foam sofa-bed mattress in eight sizes from 35 × 72 to 64 × 72.
Trial: 365-night sleep guarantee (page text)
Buyers said they could no longer feel the bars or frame of the pull-out, including one sleeping on it nightly while caring for a parent.
Several called it a big step up from the spring or air mattress that came with the sofa, and said it still folds up.

Think about

Made for sofas that take a 4–5″ mattress; thinner frames may not fold.
One buyer said it slept a little warm.
Firmness split buyers: an RV buyer found it too soft, while another found it a bit too firm.

Based on the maker’s published specs and terms, and the owner reviews linked below. We haven’t slept on it. Something wrong? Tell us.

What owners say

From reviews on the seller’s site A small set of real reviews, each linked to its source. Not a star rating.

Small sample · 12 owner reports

Only brand-hosted reviews were found: buyers say they no longer feel the sofa-bed frame; complaints are about warmth and firmness either way.

What people liked

Buyers said they could no longer feel the bars or frame of the pull-out, including one sleeping on it nightly while caring for a parent. Source ↗
Several called it a big step up from the spring or air mattress that came with the sofa, and said it still folds up. Source ↗

What to weigh up

One buyer said it slept a little warm. Source ↗
Firmness split buyers: an RV buyer found it too soft, while another found it a bit too firm. Source ↗

Sources & sample limits

12 reviews read on the brand's own Deluxe Sofa Bed page, 2020–2026 Sample: 12 owner reports.

Only the seller's own reviews (Yotpo widget on mattressinsider.com) were found. They are self-selected and cannot be checked; no independent owner posts naming this model turned up in web searches of Reddit and RV forums (iRV2, Thor and Forest River forums blocked automated reading).

Research checked October 14, 2026. These are sourced observations, not our own product tests or a star rating.

Every size it comes in

35 × 7235 × 72 inAs listed 38 × 7238 × 72 inAs listed 48 × 7248 × 72 inAs listed 52 × 7252 × 72 inAs listed 54 × 7254 × 72 inAs listed 58 × 7258 × 72 inAs listed 60 × 7260 × 72 inAs listed 64 × 7264 × 72 inAs listed

Taken from the maker’s size options, in the inches it publishes. Tap a size to compare every mattress made in it. Sizes marked “as listed” don’t exactly match a standard size, so check your frame.

Price for every size

From the maker’s site on Oct 24, 2026. Prices change often, so check before you buy.

Size	Inches	Price
35 x 72	35 × 72	$299 sale	See it
38 x 72	38 × 72	$299 sale	See it
48 x 72	48 × 72	$349 sale	See it
52 x 72	52 × 72	$349 sale	See it
54 x 72	54 × 72	$349 sale	See it
58 x 72	58 × 72	$399 sale	See it
60 x 72	60 × 72	$399 sale	See it
64 x 72	64 × 72	$429 sale	See it

How it compares

Beside the most similar mattresses from other brands.

	Deluxe Sofa Bed Mattress with Memory FoamMattress Insider	The Grand RoyaleAlaskan King Bed Company	The OriginalAlaskan King Bed Company	The RoyaleAlaskan King Bed Company
Type	Memory foam	Foam	Foam	Foam
Queen price	—	$11,000	$3,800	$4,400
Height	4.5″	15″	11″	12″
Trial	365 nights	See terms	See terms	See terms
Odd sizes	None	1	1	1
Expert reviews	None yet	None yet	None yet	None yet

What’s inside

11.5″ 3 lb cool-gel memory foam
23″ soy bio high-density support foam

Feel: Not published
Height: 4.5″
Custom sizes: Yes, the maker builds to your measurements

Returns and ordering

Trial and returns

365-night sleep guarantee (page text)

Before you order

Measure inside the frame, not the old mattress
Check clearance above for the height you pick
Make sure your base supports it
Buy sheets in the same exact size

Questions

What is it made of?

4.5″ sofa-bed replacement: 1.5″ cool-gel memory foam over 3″ soy-based high-density support foam. The page says it fits sofas built for 4″ to 5″ mattresses.

How firm is it?

Not published That’s the maker’s description; we haven’t measured it.

Which sizes and heights can I get?

8 sizes, 4.5″. See every size. Confirm your exact size and height with the seller.

Are the reviews about this exact mattress?

From reviews on the seller’s site. Only the seller's own reviews (Yotpo widget on mattressinsider.com) were found. They are self-selected and cannot be checked; no independent owner posts naming this model turned up in web searches of Reddit and RV forums (iRV2, Thor and Forest River forums blocked automated reading).

Where did this information come from?