Firmness 7–8 / 10 · Back & stomach sleeper ideal

Firm Mattresses

Q: Is a firm mattress good for back pain?

For many back pain sufferers - particularly those who sleep on their back or stomach - a firm mattress can reduce pain by keeping the spine in a more neutral position overnight. A surface that is too soft lets the hips sink below shoulder level, which curves the lumbar spine and creates tension. However, firm is not universally correct: side sleepers with back pain often need a medium or medium-soft to allow the hips and shoulders to sink slightly and relieve pressure.

Q: Firm vs medium mattress - what is the difference?

A medium mattress (4-6/10) provides more contouring and sinkage than a firm. Medium accommodates a wider range of sleep positions and body types and is the most popular firmness sold. A firm mattress (7-8/10) offers less sinkage, stronger surface support, and more resistance. Firm works best for back sleepers, stomach sleepers, and heavier individuals.

Q: What sleep positions are best for a firm mattress?

Back sleepers benefit most from firm mattresses - the flat, supported surface maintains lumbar curvature without dipping. Stomach sleepers need firm to extra firm to prevent the hips from sinking and overextending the lower back. Combination sleepers who spend significant time on their back may also do well on firm. Side sleepers are generally not recommended a firm mattress because it does not contour enough at the hips and shoulders.

Q: Do firm mattresses work for heavier sleepers?

Yes - in fact, firm mattresses are particularly well-suited for heavier sleepers (230+ lbs). Body weight accelerates sinkage in any mattress. A mattress that feels medium to a 160-lb person may feel soft to a 280-lb person. Heavier sleepers often need a firmer starting point to achieve the support level that keeps their spine aligned. A firm hybrid is usually the top recommendation.

Q: How long does a firm mattress last?

Firm mattresses tend to last as long or longer than soft mattresses because their denser materials are more resistant to wear. A quality firm mattress from a major brand should last 8-12 years with normal use. Hybrid firm mattresses with pocketed coils typically hold up the best over time.

Q: Firm vs extra firm - which do I need?

Firm (7-8/10) is the most commonly recommended "firm" level - solid support with just enough comfort layer to avoid feeling like a board. Extra firm (9-10/10) has almost no comfort layer and is generally only recommended for stomach sleepers, very heavy individuals, or people with specific medical requirements. For most shoppers asking for "a firm mattress," a 7-8 is the right target, not a 9-10.

Q: Can a firm mattress be returned if it does not feel right?

Yes. Every firm mattress at LA Mattress Store comes with a 120-night sleep trial. We ask that you sleep on it for at least 30 nights before making a final decision - your body needs time to adjust from your previous mattress. If after 30 nights the mattress is not right, contact us for a free exchange or return. No restocking fee.

A firm mattress rates 7–8 on a 10-point scale — solid spinal support with minimal sinkage. The ideal choice for back sleepers, stomach sleepers, heavier bodies (230+ lbs), and anyone with back pain from a too-soft bed.

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7–8Firmness rating

4Firm types

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The firmness scale

Where firm sits on the scale.

Firmness is measured on a 1–10 scale. Firm sits at 7–8 — solid support with minimal sinkage, not as rigid as extra firm (9–10).

Ultra Plush

Plush

Med-Soft

Medium

FirmYou're here

Firm

Extra Firm

Extra FirmStomach only

4 firm types

Four ways to feel firm.

Firm is a firmness rating, not a material. Every major construction comes in a firm option — each with a slightly different feel at the same rating.

Firm Hybrid

A firm hybrid uses a supportive coil base with a thinner, denser comfort layer. Responsiveness and airflow of coils + the controlled feel of a firm surface. Best all-around for back and stomach sleepers.

From $699

Shop Firm Hybrid

Dense pressure absorption, minimal sinkage

Featured firm collections

The firm standouts from our top brands.

Three brands we carry engineer standout firm models worth calling out. Each available at our 5 LA showrooms.

Tempur-Pedic

ProAdapt Firm and LuxeAdapt collections

From $1,699

Shop Tempur-Pedic

Stearns & Foster

Firm luxury innerspring and hybrid

From $1,499

Shop Stearns & Foster

Helix

Helix Dawn - engineered for firm preference

From $749

Shop Helix

Browse the collection

All firm mattresses we carry.

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Spring AirInnerspring

Spring Air Value Collection Olive Firm 8" Mattress

FirmnessFirm

TTXLFQK

From $299$399

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As low as $13/mo

Feature	Plush	Medium	You’re hereFirm	Extra Firm
Firmness scale	1-3 / 10	4-6 / 10	7-8 / 10	9-10 / 10
Best position	Side	All positions	Back, Stomach	Stomach
Body weight	Under 130 lbs	130-230 lbs	180-280 lbs	250+ lbs
Sinkage	Deep contouring	Moderate	Minimal	Very minimal
Edge support	Weaker	Good	Strong	Strong
Cooling	Varies	Good	Good	Good
Back pain relief	Side sleepers only	Good for most	Strong for back/stomach	Stomach only

Firm Mattresses

Where firm sits on the scale.

Four ways to feel firm.

Firm Hybrid

Firm Memory Foam

Firm Latex

Firm Innerspring

The firm standouts from our top brands.

Tempur-Pedic

Stearns & Foster

Helix

All firm mattresses we carry.

Plush vs Medium vs Firm vs Extra Firm.

Who firm mattresses are for.

Back sleepers

Stomach sleepers

Heavier sleepers (230+ lbs)

Back pain sufferers

Hot sleepers