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Images: Shifman. Shown size and configuration may vary.

Shifman

Keepsake

Name: Shifman Keepsake
Brand: Shifman

Best for: Extra-firm, flippable support

A 12″ two-sided innerspring mattress with 726 coils (individually wrapped), made in Newark, NJ; Shifman calls the feel “Ultra Firm, Ultra Supportive”.

Good to know: Sold only through retailers, which set the trial and return terms; the warranty length is on the law label.

Type: Innerspring
Height: 12″
Sizes: Made to order + custom

Made to your measurements · 12″

Where to get it

shifmanmattresses.comQueen $11,000 · checked Oct 17 Get a quote

Returns: Not published by Shifman; set by the selling retailer 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

Extra-firm, flippable support

Good

A 12″ two-sided innerspring mattress with 726 coils (individually wrapped), made in Newark, NJ; Shifman calls the feel “Ultra Firm, Ultra Supportive”.
Trial: Not published by Shifman; set by the selling retailer
One long-time owner said their Shifman showed no sag, firmness loss or edge breakdown and they could still sit on the edge without sliding off.
Height: 12″

Think about

Sold only through retailers, which set the trial and return terms; the warranty length is on the law label.
Two Bloomingdale’s buyers reported the mattress sinking or developing low spots within about a month.
One of them said the store charged a 10% fee to take the defective mattress back.

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 owners of a related model A small set of real reviews, each linked to its source. Not a star rating.

Small sample · 3 owner reports

GoodBed's Shifman page (mostly not split by model) mixes reports of long-lasting support with complaints of early sagging in pillow tops.

What people liked

One long-time owner said their Shifman showed no sag, firmness loss or edge breakdown and they could still sit on the edge without sliding off. Source ↗

What to weigh up

Two Bloomingdale’s buyers reported the mattress sinking or developing low spots within about a month. Source ↗
One of them said the store charged a 10% fee to take the defective mattress back. Source ↗

Sources & sample limits

3 written GoodBed owner reviews (brand page, page 1); most other entries are ratings only Sample: 3 owner reports.

The written reviews name only 'Shifman', not this model; returns are set by the selling retailer. Reddit returned HTTP 403 to automated requests.

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.

	KeepsakeShifman	Santa Cruz MattressCustom Comfort Mattress	Sonoma MattressCustom Comfort Mattress	All Cotton MattressRoyal-Pedic
Type	Innerspring	Innerspring	Innerspring	Innerspring
Queen price	$11,000	$14,955	$8,370	$8,190
Height	12″	12″	11″	9.5″
Trial	See terms	365 nights	365 nights	See terms
Odd sizes	None	None	None	None
Expert reviews	None yet	None yet	None yet	None yet

What’s inside

16 Layers of Natural Cotton
2High Density Foam (improved spinal alignment)
3Springs: 726 Individually Wrapped Coils
4Foundation: 8-Way Hand-Tied Boxspring

Feel: Ultra Firm, Ultra Supportive
Height: 12″
Custom sizes: Yes, the maker builds to your measurements

Returns and ordering

Trial and returns

Not published by Shifman; set by the selling retailer

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?

Two-sided, hand-tufted innerspring on 726 coils (individually wrapped). Layers: 6 layers of natural cotton; high density foam (improved spinal alignment). 12″ tall. Foundation: 8-Way Hand-Tied Boxspring. Listed as adjustable-base friendly.

How firm is it?

Ultra Firm, Ultra Supportive 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?

From owners of a related model. The written reviews name only 'Shifman', not this model; returns are set by the selling retailer. Reddit returned HTTP 403 to automated requests.

Where did this information come from?

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