BioPosture 12″ iSwitch Flippable Two-Sided Mattress

Name: Corsicana BioPosture 12″ iSwitch Flippable Two-Sided Mattress
Brand: Corsicana

Best for: Two feels, flippable

A 12″ all-foam bed with a medium-firm side and a medium-soft side, also made in split king and split Cal King.

Good to know: The product page shows two different 'regular' prices, so confirm the price before buying.

Type: Foam
Height: 12″
Sizes: 0 ready-made
Certified: CertiPUR-US

Made to your measurements · 12″

Where to get it

corsicanamattress.comQueen $2,039 (sale price) · checked Oct 17 See price
Split kingCKS (2) – Split Cal King (two pieces) See the list

Returns: Not published 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

Two feels, flippable

Good

A 12″ all-foam bed with a medium-firm side and a medium-soft side, also made in split king and split Cal King.
2 firmness choices: Medium Firm side, Medium Soft side
Trial: Not published
Height: 12″

Think about

The product page shows two different 'regular' prices, so confirm the price before buying.
No owner reviews we could verify yet

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

No owner reviews we can verify yet A small set of real reviews, each linked to its source. Not a star rating.

No independent owner feedback naming this model was found or researched.

What people liked

No supported praise summary in the sample.

What to weigh up

No substantive concern verified in this small sample. This is a gap in the evidence, not proof of no drawbacks.

Sources & sample limits

None Sample: 0 owner reports.

Store-sold model; independent owner reviews by model name were not found in this pass.

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

Every size it comes in

Made around your measurements. The maker confirms width, length, height and any cut corners before building it.

How it compares

Beside the most similar mattresses from other brands.

	BioPosture 12″ iSwitch Flippable Two-Sided MattressCorsicana	AS3Amerisleep	AS5Amerisleep	Plank FirmBrooklyn Bedding
Type	Foam	Memory foam	Memory foam	Foam
Queen price	$2,039	$1,249	$1,849	$1,332
Height	12″	12″	14″	10″
Trial	See terms	100 nights	100 nights	365 nights
Odd sizes	None	None	None	8
Expert reviews	None yet	3	4	4

What’s inside

1Zip-off cover
2Soft side: 2″ gel memory foam + 1″ gel swirl memory foam
36″ Air Grid base foam
4Firm side: 3″ gel memory foam
5Patented edge support

Feel: Medium Firm side, Medium Soft side
Height: 12″
Custom sizes: Not offered for this model

Returns and ordering

Trial and returns

Not published

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?

Flippable all-foam bed: one side has 2″ gel memory foam and 1″ gel swirl memory foam (soft side), the other 3″ gel memory foam (firm side), around a 6″ Air Grid base foam, with patented edge support and a zip-off cover.

How firm is it?

Medium Firm side, Medium Soft side That’s the maker’s description; we haven’t measured it.

Which sizes and heights can I get?

It’s made to your measurements. Confirm your exact size and height with the seller.

Are the reviews about this exact mattress?

No owner reviews we can verify yet. Store-sold model; independent owner reviews by model name were not found in this pass.

Where did this information come from?

Checked 2026-10-17. Specs and terms can change.