Cyber Monday Sale On King Size Mattress For Side Sleepers

Explore king size mattresses for side sleepers this Cyber Monday, with comfort options to compare and room to stretch out. Look for cushioning at the shoulders and hips balanced with support for your body’s natural alignment, then compare firmness levels and materials to narrow your choices.

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Sleepy's By Sealy Memory Foam Medium Mattress

3563

Starting at

$889⁹⁹

Medium Comfort, best for

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

Serta Perfect Sleeper Charlotte 2.0 Medium Euro Top Mattress

2624

Starting at

$1499⁹⁹

Medium Comfort, best for

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

FREE ADJUSTABLE BASE ³ with code ELEVATE

Sleepy's By Sealy Memory Foam Plush Mattress

2837

Starting at

$999⁹⁹

Plush Comfort, best for

Side Sleepers
Pain
Bed Partner
Toss and Turn
Temperature

FREE ADJUSTABLE BASE ³ with code ELEVATE

Serta Perfect Sleeper Sleep Excellence Medium PillowTop Mattress

1463

Starting at

$1449⁹⁹

$1999⁹⁹

$550 OFF

Medium Comfort, best for

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

FREE ADJUSTABLE BASE ³ with code ELEVATE

Tempur-Pedic TEMPUR-Adapt 11" Medium Previous Generation Mattress

3700

Starting at

$2029⁷⁷

$2899⁰⁰

$869 OFF

Medium Comfort, best for

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

Beautyrest BR800 13.5" Plush Pillow Top Mattress

2806

Starting at

$1499⁹⁹

Plush Comfort, best for

Side Sleepers
Toss and Turn
Pain
Bed Partner
Temperature

FREE ADJUSTABLE BASE ³ with code ELEVATE

Tulo Bamboo 10" Medium Green Tea Memory Foam Mattress

5597

Starting at

$889⁹⁹

Medium Comfort, best for

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

Tulo Bamboo 12" Medium Plush Green Tea Memory Foam Mattress

5597

Starting at

$1019⁹⁹

Medium Comfort, best for

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

Beautyrest BR800 13.5" Medium Pillow Top Mattress

1891

Starting at

$1499⁹⁹

Medium Comfort, best for

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

FREE ADJUSTABLE BASE ³ with code ELEVATE

Beautyrest Silver BRS900 11.75" Medium Firm Mattress

1768

Starting at

$1099⁹⁹

Medium Comfort, best for

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

FREE ADJUSTABLE BASE ³ with code ELEVATE

Tulo Bamboo 8" Medium Green Tea Memory Foam Mattress

5597

Starting at

$809⁹⁹

Medium Comfort, best for

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

Purple Original Mattress

59801

Starting at

$2199⁰⁰

Medium Comfort, best for

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

Sleepy's By Sealy Slumber Cushion Firm Mattress

307

Starting at

$619⁹⁹

$1999⁹⁹

$1380 OFF

Medium Comfort, best for

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

FREE ADJUSTABLE BASE ³ with code ELEVATE

Sealy Essentials Winter Green 13" Plush Euro Pillow Top Mattress

549

Starting at

$1459⁹⁹

Plush Comfort, best for

Side Sleepers
Bed Partner
Pain
Temperature
Toss and Turn
Allergies

Beautyrest BR800 12" Plush Euro Top Mattress

758

Starting at

$1399⁹⁹

Plush Comfort, best for

Side Sleepers
Toss and Turn
Pain
Bed Partner
Temperature

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

1013

Starting at

$4699⁰⁰

Medium Comfort, best for

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

Receive $300 Instant Gift⁴ with purchase.

Finding a king size mattress for side sleepers on Cyber Monday starts with understanding how cushioning and support work together. Side sleeping places more weight on the shoulders and hips, so a mattress with pressure-relieving comfort layers can help those areas settle comfortably while supporting the waist. Memory foam mattresses offer close contouring, while hybrid mattresses combine foam or other comfort materials with a coil support system. The best king size mattress for side sleepers depends on body weight, comfort preferences and whether you share your bed. A softer surface may suit someone who needs more cushioning, while a medium or medium-firm mattress may provide a better balance for someone who needs additional support. Look beyond the firmness label and consider how the mattress feels across your shoulders, hips and lower back. A standard king mattress typically measures 76 inches wide by 80 inches long, giving partners room to change positions and find a comfortable sleeping space. As you compare Cyber Monday king size mattress options, focus on features that address your everyday sleep needs rather than price alone. If a partner’s movements tend to disturb you, consider a mattress designed for motion isolation. If you often feel warm at night, look for breathable covers and construction that encourages airflow, while remembering that bedding and room temperature also affect comfort. Edge support is another useful consideration, especially if you sleep near the perimeter or sit on the side of the mattress. Before choosing a king size memory foam mattress or king size hybrid mattress, review the total cost, delivery details, warranty terms and any applicable sleep trial requirements. Check whether your existing foundation is compatible and measure your bedroom, doorways and delivery path to help ensure a smooth setup. Our Sleep Experts® can help you compare pressure relief, support and comfort features so you can choose a king mattress for side sleeping with greater confidence this Cyber Monday.

What mattress details should side sleepers compare on Cyber Monday? + -

Compare the mattress construction, firmness description, comfort-layer materials and cover fabric. These details help you understand how each mattress is made beyond its product name.

How do foam and hybrid mattresses differ? + -

Foam mattresses use foam layers throughout, while hybrid mattresses combine foam or latex comfort layers with a coil support system. Both constructions come in a range of firmness levels and surface feels.

What do mattress firmness descriptions mean for side sleepers? + -

Terms such as plush, medium and firm describe how soft or firm a mattress feels. Firmness scales can vary by brand, so read the accompanying feel descriptions rather than comparing ratings alone.

What is the difference between a pillow top and a Euro top? + -

A pillow top has an added cushioning layer with a visible separation from the mattress below. A Euro top has a cushioning layer sewn flush with the mattress edges for a more uniform appearance.

What should side sleepers know about mattress covers? + -

Mattress covers vary in fabric, texture and construction, including smooth stretch-knit surfaces and quilted finishes. Check the care instructions to learn whether the cover is removable and how it should be cleaned.