Luxury Medium Firm King Mattresses

Luxury Medium Firm King Mattresses offer a spacious option for shoppers seeking a balanced mattress feel with an elevated touch. Explore the selection at Mattress Firm to compare available sizes, comfort levels and pricing as you find the right fit for your bedroom and sleep preferences.

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Stearns & Foster Lux Estate Elite 16" Medium Euro Pillow Top Mattress

984

Starting at

$4099⁰⁰

$4699⁰⁰

$600 OFF

Medium Comfort, best for

Back, Side, Stomach Sleepers
Pain
Bed Partner
Temperature
Toss and Turn

Receive $300 Instant Gift⁴ with purchase.

Beautyrest Black Series Three 15.25" Medium Mattress

2298

Starting at

$4199⁰⁰

$4799⁰⁰

$600 OFF

Medium Comfort, best for

Back, Side, Stomach Sleepers
Pain
Bed Partner
Temperature
Toss and Turn

$300 ⁶ adjustable base instant gift with purchase.

Tempur-Pedic TEMPUR-LuxeAdapt 2.0 13" Medium Hybrid Mattress

2273

Starting at

$5099⁰⁰

$5599⁰⁰

$500 OFF

Medium Comfort, best for

Back, Side, Stomach Sleepers
Pain
Temperature
Allergies
Bed Partner
Toss and Turn

Receive $300 Instant Gift⁴ with purchase + Calm app 3-month free trial

Purple RestorePremier Cool Touch 13" Hybrid Mattress

856

Starting at

$4700⁰⁰

$5499⁰⁰

$799 OFF

Medium Comfort, best for

Back, Side, Stomach Sleepers
Pain
Allergies
Bed Partner
Toss and Turn

$300 ^◇ adjustable base instant gift with purchase.

Beautyrest Black Series Four 17.5" Medium Summit Pillow Top Mattress

606

Starting at

$5899⁰⁰

$6599⁰⁰

$700 OFF

Medium Comfort, best for

Back, Side, Stomach Sleepers
Pain
Temperature
Bed Partner
Toss and Turn

$300 ⁶ adjustable base instant gift with purchase.

Beautyrest Black Series Three 16.25" Medium Pillow Top Mattress

471

Starting at

$4599⁰⁰

$5199⁰⁰

$600 OFF

Medium Comfort, best for

Back, Side, Stomach Sleepers
Pain
Bed Partner
Temperature
Toss and Turn

$300 ⁶ adjustable base instant gift with purchase.

Tempur-Pedic TEMPUR-LuxeBreeze Medium Hybrid 13" Mattress

2141

Starting at

$6099⁰⁰

$6599⁰⁰

$500 OFF

Medium Comfort, best for

Back, Side, Stomach Sleepers
Pain
Bed Partner
Temperature
Allergies
Toss and Turn

Receive $300 Instant Gift⁴ with purchase + Calm app 3-month free trial

Tempur-Pedic TEMPUR-ProBreeze Medium Hybrid 12" Mattress

1671

Starting at

$4699⁰⁰

$5199⁰⁰

$500 OFF

Medium Comfort, best for

Back, Side, Stomach Sleepers
Pain
Bed Partner
Temperature
Toss and Turn

Receive $300 Instant Gift⁴ with purchase + Calm app 3-month free trial

Tempur-Pedic TEMPUR-ProBreeze Medium 12" Mattress

417

Starting at

$4699⁰⁰

$5199⁰⁰

$500 OFF

Medium Comfort, best for

Back, Side, Stomach Sleepers
Pain
Bed Partner
Temperature
Toss and Turn

Receive $300 Instant Gift⁴ with purchase + Calm app 3-month free trial

Stearns & Foster Reserve 16" Medium Mattress

268

Starting at

$4799⁰⁰

$5499⁰⁰

$700 OFF

Medium Comfort, best for

Back, Side, Stomach Sleepers
Pain
Bed Partner
Temperature
Toss and Turn

Receive $300 Instant Gift⁴ with purchase.

Beautyrest Black Hybrid Series Three 15" Medium Mattress

154

Starting at

$4599⁰⁰

$5199⁰⁰

$600 OFF

Medium Comfort,

Pain
Bed Partner
Temperature
Toss and Turn

$300 ⁶ adjustable base instant gift with purchase.

Purple Rejuvenate Royale Duchess Mattress

Starting at

$7100⁰⁰

$8699⁰⁰

$1599 OFF

Medium Comfort, best for

Back, Side, Stomach Sleepers
Pain
Bed Partner
Temperature
Toss and Turn

$300 adjustable base instant gift with purchase.

Kingsdown Wesley 15.5" Medium Mattress

Starting at

$4199⁰⁰

$4799⁰⁰

$600 OFF

Medium Comfort, best for

Back, Stomach, Side Sleepers
Pain
Bed Partner
Temperature
Toss and Turn

$300 ⁶ adjustable base instant gift with purchase.

Purple Rejuvenate Royale Monarch Mattress

Starting at

$8200⁰⁰

$9799⁰⁰

$1599 OFF

Medium Comfort, best for

Back, Side, Stomach Sleepers
Pain
Bed Partner
Temperature
Toss and Turn

$300 adjustable base instant gift with purchase.

Kingsdown Wesley 17" Lux Medium Pillowtop Mattress

Starting at

$5899⁰⁰

$6599⁰⁰

$700 OFF

Medium Comfort, best for

Back, Stomach, Side Sleepers
Pain
Bed Partner
Temperature
Toss and Turn

$300 ⁶ adjustable base instant gift with purchase.

Luxury medium firm king mattresses offer a balanced sleep surface with the spacious comfort of a king size bed and the elevated feel of a luxury mattress. Designed to combine cushioning with dependable support, a medium firm king mattress can help accommodate a variety of sleep preferences, including back, side and combination sleepers. Premium materials such as memory foam, responsive coils, cooling covers and pressure-relieving comfort layers may create a more comfortable sleep environment while helping support proper spinal alignment. For couples, a luxury king mattress also provides generous room to stretch out, along with features such as motion isolation and reinforced edges on select models. Choosing the best luxury medium firm king mattress depends on your preferred feel, sleep position and comfort needs. Look for a mattress with durable construction, breathable materials and targeted support for the shoulders, hips and lower back. Hybrid, innerspring and all-foam designs can each deliver a medium firm feel, but their responsiveness, airflow and pressure relief may differ. Mattress Firm offers luxury king mattresses from trusted brands in a range of medium firm options, making it easier to compare comfort technologies and find a mattress that supports better zzz's for years to come. Pair your new mattress with a compatible king bed frame, adjustable base or supportive foundation for a complete sleep setup.

What makes a luxury medium firm mattress feel different? + -

Luxury medium firm mattresses typically combine premium materials, refined construction and balanced cushioning for a supportive feel with a comfortable amount of pressure relief.

Who may prefer a medium firm mattress? + -

A medium firm feel may appeal to sleepers who enjoy a balance of cushioning and support rather than a distinctly soft or extra firm surface. Personal comfort preferences and sleep position can help guide your choice.

What materials are commonly found in luxury medium firm mattresses? + -

Common materials include breathable foams, responsive coils, natural fibers and plush comfort layers. The combination varies by mattress, so review the construction details to find the feel and features you prefer.

How can I compare luxury medium firm mattresses? + -

Compare the comfort feel, support system, materials, thickness and temperature features. Consider whether you prefer a more contouring surface, a responsive feel or added breathability.

How should I care for a luxury medium firm mattress? + -

Use a compatible foundation, protect the surface with a quality mattress protector and follow the care instructions from the manufacturer. Rotating the mattress when recommended can also help promote more even wear.