Memorial Day King Size Mattresses Sale

The Memorial Day King Size Mattresses Promotion is a great time to explore king size mattresses at Mattress Firm. Browse a range of options and find the right fit for your bedroom, comfort preferences and budget.

Sleepy's Basic Innerspring Firm Mattress

8752

Starting at

$249⁹⁹

Firm Comfort, best for

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

Sleepy's Basic Foam Mattress

1428

Starting at

$259⁹⁹

$649⁹⁹

$390 OFF

Firm Comfort, best for

Back, Stomach Sleepers
Pain
Temperature
Bed Partner
Toss and Turn

Serta Perfect Sleeper Sleep Excellence Medium PillowTop Mattress

1466

Starting at

$1999⁹⁹

Medium Comfort, best for

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

FREE ADJUSTABLE BASE ³ with code ELEVATE

Beautyrest BR800 13.5" Plush Pillow Top Mattress

2808

Starting at

$819⁹⁹

$1499⁹⁹

$680 OFF

Plush Comfort, best for

Side Sleepers
Toss and Turn
Pain
Bed Partner
Temperature

FREE ADJUSTABLE BASE ³ with code ELEVATE

Beautyrest BR800 11.25" Firm Mattress

2258

Starting at

$619⁹⁹

$1299⁹⁹

$680 OFF

Firm Comfort, best for

Back, Stomach Sleepers
Toss and Turn
Pain
Bed Partner
Temperature

FREE ADJUSTABLE BASE ³ with code ELEVATE

Stearns & Foster Estate 14.5" Firm Mattress

1862

Starting at

$3099⁰⁰

Firm Comfort, best for

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

Receive $300 Instant Gift⁴ with purchase.

Tulo Bamboo 12" Medium Plush Green Tea Memory Foam Mattress

5599

Starting at

$429⁹⁹

$1019⁹⁹

$590 OFF

Medium Comfort, best for

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

Beautyrest BR800 12" Plush Euro Top Mattress

758

Starting at

$569⁹⁹

$1399⁹⁹

$830 OFF

Plush Comfort, best for

Side Sleepers
Toss and Turn
Pain
Bed Partner
Temperature

Sealy Essentials Winter Green 12" Medium Euro Top Mattress

604

Starting at

$739⁹⁹

$1379⁹⁹

$640 OFF

Medium Comfort, best for

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

Beautyrest Silver BRS900 12" Plush Mattress

1164

Starting at

$729⁹⁹

$1699⁹⁹

$970 OFF

Plush Comfort, best for

Side Sleepers
Temperature
Pain
Bed Partner
Toss and Turn

FREE ADJUSTABLE BASE ³ with code ELEVATE

Nectar Premier 13" Medium Memory Foam Mattress

574

Starting at

$1099⁰⁰

$1799⁰⁰

$700 OFF

Medium Comfort, best for

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

Sealy Essentials Spruce 5.5" Firm Mattress

1373

Starting at

$549⁹⁹

$949⁹⁹

$400 OFF

Firm Comfort, best for

Back, Stomach Sleepers
Pain
Temperature
Bed Partner
Toss and Turn

Beautyrest Black Series Two 16.25" Plush Pillow Top Mattress

301

Starting at

$4099⁰⁰

Plush Comfort, best for

Side Sleepers
Pain
Bed Partner
Temperature
Toss and Turn

$300 ⁶ adjustable base instant gift with purchase.

Tempur-Pedic TEMPUR-Adapt 2.0 11" Medium Hybrid Mattress

3083

Starting at

$3299⁰⁰

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 Restore 11.5" Soft Hybrid Mattress

1686

Starting at

$3399⁰⁰

Plush Comfort, best for

Side Sleepers
Pain
Allergies
Bed Partner
Toss and Turn
Temperature

Tempur-Pedic TEMPUR-LuxeAdapt 2.0 13" Firm Mattress

1491

Starting at

$5599⁰⁰

Firm Comfort, best for

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

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

A king size mattress gives sleepers generous room to stretch out, settle into a comfortable position and enjoy less nighttime disruption from a partner’s movement. With more surface area than a queen, it can be especially appealing to couples, people who share their bed with children or pets and anyone who prefers a spacious sleep environment. Memorial Day is a popular time to explore king mattresses because holiday pricing can make a larger sleep upgrade more approachable, whether you are furnishing a primary bedroom, replacing an older mattress or creating a more welcoming guest room. A king mattress may also be a thoughtful gift for newlyweds, parents setting up a new home or loved ones who have been putting off an important comfort upgrade. To compare another popular size, browse the Memorial Day Full Size Mattresses. Full size mattresses take up less room while still offering plenty of space for one sleeper, making them useful for guest rooms, apartments and smaller bedrooms.

When choosing among king size mattresses, start with the way you sleep and the type of support that feels natural to you. Side sleepers often appreciate a cushioning comfort layer that helps ease pressure around the shoulders and hips, while back sleepers commonly look for balanced support that keeps the body feeling level from head to toe. Stomach sleepers may prefer a firmer surface that helps prevent the midsection from sinking too deeply, and combination sleepers generally benefit from a responsive design that makes it easier to change positions. Couples should also consider motion isolation, especially if one person gets up early, works different hours or tends to move throughout the night. A mattress with strong motion control can help keep a partner’s movement from traveling across the surface. Temperature is another useful consideration. If you often wake feeling warm, look for breathable materials and a design that encourages airflow. If you enjoy a close, cozy feel during cooler months, a contouring comfort layer may provide the enveloping sensation you prefer. Keep the bedroom in mind as well: measure the available floor space, account for nightstands and walking paths and confirm that the mattress can make it through doorways and stairwells. A king mattress works best with a properly sized foundation or adjustable base, and supportive bedding with deep enough pockets can help complete the setup.

Comfort is personal, so taking time to compare firmness, materials and construction can make the decision feel much easier. Memory foam is known for contouring closely to the body and reducing motion transfer, while hybrid designs combine pressure-relieving comfort layers with supportive coils for a more buoyant feel. Innerspring options can provide a familiar responsive surface and steady airflow, and pillow-top constructions add an extra layer of softness for sleepers who enjoy a plush sensation. There is no single comfort level that works for everyone; the right choice depends on body type, sleep position, temperature preferences and the feel you find most relaxing. Consider the mattress height, too, especially if you have a tall bed frame or prefer an easier step-in height. If you are shopping for two people, talk through preferences before making a selection and look for a design that offers a sensible middle ground. Many shoppers find it helpful to lie in their usual sleep position and notice whether their spine feels supported, their shoulders and hips feel comfortably cushioned and their body can move without effort. A king size mattress is a meaningful home investment, and thoughtful comparison can help you create the restful, inviting bedroom you picture at the end of a long day. With guidance from Sleep Experts®, it is easier to choose a mattress that supports better zzz's and helps you live well. We make sleep easy™.

What types of mattresses are commonly included in a Memorial Day promotion? + -

Memorial Day promotions may feature memory foam, innerspring, hybrid and TEMPUR-Pedic® mattresses in a range of comfort feels and designs.

How do I choose the right comfort feel for a mattress? + -

Consider whether you prefer a plush, medium or firm feel, along with the materials and construction that match your personal comfort preferences.

What is the difference between memory foam, innerspring and hybrid mattresses? + -

Memory foam mattresses use foam layers, innerspring mattresses rely on a coil support system and hybrid mattresses combine coils with foam or other comfort materials.

Can a new mattress be used with an existing bed frame? + -

Many mattresses are compatible with common bed frames and foundations, but check the mattress and frame requirements to make sure they work together.

How should I care for a new mattress? + -

Use a mattress protector, follow the manufacturer's care instructions and keep the sleep surface clean with regular vacuuming and spot cleaning as recommended.