Best Split King Size Mattresses of 2026

Mark Greer Avatar
Mark Greer
Last Updated: Feb 1, 2026

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Split King Size Mattresses are the perfect solution for couples who have different sleeping preferences. This type of mattress is essentially two Twin XL mattresses placed side by side, allowing each person to adjust their own side of the bed to their desired firmness and comfort level. This means that one partner can sleep on a firmer mattress while the other can opt for a softer one, ensuring that both individuals get a good night's sleep. Split King Size Mattresses are also great for adjustable beds, as each side can be adjusted independently. With a range of materials and features to choose from, Split King Size Mattresses are a versatile and practical choice for any couple.

At a Glance: Our Top Picks

Novilla 12" Gel Memory Foam King Mattress Cover #TOP 1
Novilla 12" Gel Memory Foam King Mattress
ftb score rating icon 9.8
ZINUS 12 Inch Green Tea Mattress Cover #TOP 2
ZINUS 12 Inch Green Tea Mattress
ftb score rating icon 9.7
Sweetnight CoolNest 14 Inch King Mattress Cover #TOP 3
Sweetnight CoolNest 14 Inch King Mattress
ftb score rating icon 9.5

Top 10 Split King Size Mattresses

#TOP 1

Novilla 12" Gel Memory Foam King Mattress

NAMM12KGYV15
Grey
King
Novilla 12" Gel Memory Foam King Mattress Cover
Novilla King Size Mattress, 12 Inch Gel Memory Foam King Mattress for Cool Night & Pressure Relief, Medium Plush Feel with Motion Isolating, Bliss

Novilla King Size Mattress is a 12-inch gel memory foam mattress that provides a cool sleep, pressure relief, and medium-firm feel. It has a 4-layer all-foam system that includes a gel-infused memory foam, egg crate designed foam layer, comfort foam, and high-density foam to distribute pressure, mold to your body and improve durability. The mattress is made of CertiPUR-US Certified foam, without any harmful off-gassing and substances, and the bed mattress cover uses skin-friendly rayon fabric. It comes in a box and fits all kinds of bed frames, and you can try it out for 100-days free trial.

What We Like
Comfortable and supportive
Easy setup and unboxing
Excellent motion isolation
Cooling gel memory foam
Great value for the price
#TOP 2

ZINUS 12 Inch Green Tea Mattress

ZU-MFMA1ZZI-12K
White
King
ZINUS 12 Inch Green Tea Mattress Cover
Zinus 12 Inch King Green Tea Memory Foam Mattress [New Version], Fiberglass Free, Medium Firm Feel, Zoned Pressure Relief, Certified Safe Foams & Fabric, Mattress in A Box

The ZINUS Green Tea Mattress is designed for a restful night's sleep while being eco-friendly. Its innovative zoned pressure relief technology helps alleviate aches and pains, ensuring you wake up refreshed. The mattress features pressure-relieving memory foam that molds to your body, promoting better circulation and reducing stress on your joints. Additionally, the natural green tea and purified charcoal infusions keep your mattress smelling fresh, enhancing your overall sleeping experience. With certified safe materials, you can rest easy knowing your sleep environment is free from harmful chemicals.

What We Like
Exceptional comfort level
Great support and quality
Quick decompression
Easy to clean
Affordable price

Sweetnight CoolNest 14 Inch King Mattress

SN14KGYMMPRO23
Grey & Blue
Sweetnight CoolNest 14 Inch King Mattress Cover
Sweetnight CoolNest 14 Inch King Size Mattress, Cooling King Memory Foam Mattress for Cool Night Sleep, 5-Zone Ergo Support for Pressure Relief, Medium, CertiPUR-US Certified

The Sweetnight CoolNest Mattress is designed to keep you comfortable throughout the night. Its dual cooling system blends special foam with gel-infused memory foam to help manage your body temperature and reduce night sweats. The 5-zone support targets key pressure points from head to toe, helping to relieve pressure and support proper spinal alignment, which can ease back pain. Motion isolation layers absorb movements, so you won’t be disturbed by your partner’s shifts. Plus, its breathable cover boosts airflow and moisture wicking, keeping the mattress dry and cool for a refreshing sleep experience.

What We Like
Dual cooling technology
5-zone pressure relief
Motion isolation
Enhanced breathability

EGOHOME 14 Inch King Memory Foam Mattress

MCE140K0000T
Black
EGOHOME 14 Inch King Memory Foam Mattress Cover
EGOHOME 14 Inch King Size Memory Foam Mattress for Back Pain, Cooling Copper Gel Bed in a Box, Foam Made in USA, CertiPUR-US Certified, Therapeutic Medium Firm, 76x80x14 Black

The EGOHOME 14 Inch King Memory Foam Mattress features cooling fabric with graphene technology, advanced MLILY memory foam, CertiPUR-US certification and the International Chiropractors Association's endorsement for safety and health. Delivered in a box for easy setup and a worry-free 10-year limited warranty is included.

What We Like
Soft and supportive
Alleviates back pain
Cooling gel technology
#TOP 5

King Size Mattress, 12 Inch Hybrid Mattress King Size

12 Inch
Grey
King Size Mattress, 12 Inch Hybrid Mattress King Size Cover
King Size Mattress, 12 Inch Hybrid Mattress King Size, Medium Feel Foam and Individual Pocket Springs, Extra Edge Support, Pressure Relief, CertiPUR-US

Features
Advanced Hybrid Comfort System : Made With Premium Comfort Foam And Individually Wrapped Pocket Coils, This Mattress Provides Targeted Pressure Relief And Adaptive Support. The Hybrid Design Also Promotes Airflow To Keep You Breathable And Comfortable All Night.
Enjoy The Ultimate Comfort Of Sleep: Our Mattress Combines Memory Foam And Supportive Layers To Cradle Your Body And Relieve Pressure For A Truly Comfortable Night's Sleep. Designed To Adapt To All Sleep Styles, It Promotes Proper Alignment And Helps You Wake Up Refreshed And Pain-Free. Enjoy Lasting Comfort And Deep, Restful Sleep Every Night.
Reinforced Edge Support & Practical Design : The Mattress Has Upgraded Pocket Springs And Added High-Density Foam Around The Edges For Better Stability. This Prevents The Edges From Sagging Or Rolling During The Night, Giving You More Usable Sleeping Space And Protecting The Mattress Inside To Last Longer.
Easy Setup: Our Mattress Is Simple To Set Up And Fits All Types Of Frames—including Box Springs, Floors, Adjustable Beds, Foundations, Slatted Platforms, And Flat Platforms. Just Unroll And Wait 12 Hours For It To Fully Expand. Equipped With Sturdy Side Handles, It's Easy To Lift, Carry, And Reposition Whenever Needed.
10-Year Limited Warranty For Worry-Free Sleep: We Are Dedicated To Providing You With The Best Night's Sleep Possible Through Our Superior Products. If There Are Any Issues With Your Mattress, Please Contact Our Customer Support Team And They Will Assist You In Resolving The Problem. Please Note That Our Mattresses Cannot Be Returned Once Opened.
#TOP 6

Novilla King Size Mattress, 12 inch King Mattress

NAMM12KWV17
White
Novilla King Size Mattress, 12 inch King Mattress Cover
Novilla King Size Mattress, 12 inch King Mattress in a Box, Gel Memory Foam Mattresses for Cooling Night Sleep, Comfort Support and Pressure Relief, CertiPUR-US Certified

Features
Comfort Support - Novilla 12 Inch King Size Mattress Features 3 Foam Layers, Providing Superior Noise And Vibration Absorption During Sleep Movements. This Ensures That Your Deep Sleep Remains Undisturbed By Your Partner's Tossing And Turning Or Getting Up, Enhancing Overall Sleep Comfort. The High-Density Foam Offers Balanced Support To Maintain Proper Spinal Alignment. The Combination Of Gel Memory Foam And Comfort Foam Effectively Relieves Pressure Points.
Cooling And Breathable - The Novilla 12 Inch King Foam Mattress Addes 30% More NanoGel, Which Will Increase The Heat Absorption Capacity, Promotes Airflow And Provides A Refreshing Cooling Effect, Thereby Delivering An Enhanced Sleep Experience. Enjoy All-Night Comfort And Relaxation, Say Goodbye Hot And Restless Nights.
King Mattress In A Box - Novilla Memory Foam Bed Mattress Is Vacuum-Compressed And Packaged In A Compact Box For Easy Delivery. Easy To Setup And Fits All Kinds Of King Bed Frames, Even On The Floor. Mattress Is Recommended 72 Hours For Air Out And Reshape.
Healthy Sleep - Novilla Gel Memory Foam Mattress Is Quilted With A Breathable Knitted Fabric, Offering A Soft And Luxurious Feel. All Foams In The Novilla Mattress Are CertiPUR-US Certified, And The Mattress Cover Is OEKO-TEX Certified, Ensuring The Absence Of Harmful Substances. This Provides A Safe And Healthy Sleep Environment For Your Family. Additionally, It Comes With A 10-Year Protection, Ensuring A Decade Of Worry-Free.
All-Night Freshness - This Novilla King Size Mattress Is Engineered With Advanced Foam Technology That Effectively Absorbs Odors And Moisture. Ceating A Dry, Hygienic And Comfortable Sleeping Environment. This Allows You To Experience Refreshing Sleep And Wake Up Feeling Rejuvenated.
#TOP 7

SIMARTH 14 Inch King Hybrid Mattress

SC14Q-2
Black, Dark Gray
King
SIMARTH 14 Inch King Hybrid Mattress Cover
SIMARTH 14 Inch King Hybrid Mattress in a Box - Medium Firm Memory Foam & Individually Pocket Springs for Pressure Relief,Motion Isolation,CertiPUR-US Certified,Fiberglass-Free,Enhanced Edge Support

Features
[Unparalleled Sleep Enjoyment] 14 Inch Hybrid King Mattress Has A Patented Supportive Technology That Ensures Every Part Of Your Body Fits Perfectly For Unprecedented Relaxation, Effectively Relieving Fatigue And Allowing You To Have A Better Night's Sleep. All Foams In The SIMARTH Mattress Are CertiPUR-US Certified, Ensuring The Absence Of Harmful Substances. This Provides A Safe And Healthy Sleep Environment For Your Family.
[Comfortable & Breathable] King Size Mattresses 14 Inch Curated With High-End Fabrics For A Soft, Silky Touch. Exclusive Knit Fabric Technology Effectively Promote Sair Circulation Inside And Outside The Mattress, Absorbs Odors And Moisture, Creating A Dry, Hygienic And Comfortable Sleeping Environment. This Allows You To Experience Refreshing Sleep And Wake Up Feeling Rejuvenated.
[Perfect Scientific Combination] Unlike The Traditional 2 Coils, We Offer The Hybrid Mattress With The Addition Of 3 Coils, Which Enhances The Mattress's Edge Support, Adapting The Support Force In Real Time To Body Movements And Pressure Changes, Ensuring Optimal Support And Rebound. At The Same Time, The High Resilience Of The Spring Superior Against The Effects Of Your Partner's Movement. Achieve A Quiet And Comfortable Deep Sleep.
[King Mattress In A Box] We Are So Confident That You Will Love This Mattress That We Offer A 100-Night Risk-Free Trial Sleep And A 10-Year Usage Guarantee. For A Perfect Sleeping Experience, We Recommend That You Allow 24-72 Hours After Disassembly For The Mattress To Return To Its Optimal Condition. If You Have Any Other Questions You Can Contact Us Through Amazon
[Healthy Sleep] Our Medium Firm Mattres Is Made Of Individually Pocketed Springs And Multiple Layers Of Premium Memory Foam, Expertly Layered In Our High-Quality Memory Foam And Ultra-High-Density Base Foam. The Upper Layer Is A Soft Rebound Layer, And The Lower Layer Is A Strong Support Layer, Which Can Not Only Provide A Comfortable Fit, But Also Ensure That All Parts Of The Body Can Be Evenly Supported, Effectively Maintain A Natural Posture During Sleep.
#TOP 8

Sleepmax Firm King Size Mattress 14 Inch

Sleepmax Mist
14'' Ultra
King
Sleepmax Firm King Size Mattress 14 Inch Cover
Sleepmax Firm King Size Mattress 14 Inch - Extra Firm Deep Sleep Hybrid Mattresses King Pain Relief - Cooling Bed in a Box for Back & Side Sleepers - 365-Night Trial, Forever Warranty, Fiberglass-Free

Features
BALANCE OF COMFORT & SUPPORT – With A Deluxe Euro Top, Pressure-Relieving Foam Layers, And A Durable Base Reinforced With Pocketed Coils, Sleepmax Mist Delivers A Just Right Feel That Suits Back, Side, And Combination Sleepers Alike, Offering Both Softness And Stability.
PAIN RELIEF & MOTION ISOLATION – Combining The Supportive Benefits Of Coils With The Softness Of Premium Foam, Sleepmax Mist Helps Align The Spine, Evenly Distributes Body Weight, And Relieves Pressure Points For Deep, Restorative Sleep. Individually Wrapped Springs Isolate Motion And Minimize Noise, Ideal For Light Sleepers.
NON-TOXIC MATERIALS & SKIN-FRIENDLY – Sleepmax Mist Is Crafted Using CertiPUR-US And OEKO-TEX Standard 100 Certified Materials, Free From Fiberglass And Harmful Substances. It Complies With CFR1633 Fire Safety Regulations, Offering A Clean, Hypoallergenic Surface That's Gentle On Skin.
ENHANCED SAFETY & EXTENDED LIFESPAN – Built With Sturdy Edge Support To Prevent Sagging And Improve Structure, Sleepmax Mist Enhances Safety By Reducing The Chance Of Roll-Off During Sleep. Reinforced Edges Also Protect Internal Layers, Contributing To Longer-Lasting Performance.
ABOUT SLEEPMAX – With Over 40 Years Of Sleep Innovation, Sleepmax Includes A Lifetime Service Agreement With Every Mattress-In-A-Box Purchase, Reflecting Our Commitment To Reliable Quality And Long-Term Customer Care.

VIPNOW 12 Inch King Hybrid Mattress

White With Black
King
VIPNOW 12 Inch King Hybrid Mattress Cover
12 Inch King Size Mattress - 2026 Upgraded Hybrid Cooling Gel Memory Foam & Pocket Coils, Medium Firm Mattress in a Box for Back Neck Pain Relief, Motion Isolation, Edge Support, Breathable, White

The VIPNOW Hybrid King Mattress combines memory foam and pocketed coils to give you balanced comfort and support. It helps ease pressure on your body, reducing aches and fatigue for a restful night. The mattress is great for couples and pet owners because its design minimizes motion transfer, so you won’t be disturbed by movements. It also features a 7-zone support system with over 1,000 coils that adapt to your body’s curves, helping keep your spine aligned and reducing pressure on key areas like hips and shoulders. Plus, the breathable materials keep you cooler as you sleep, making your rest more comfortable.

What We Like
Pressure relief support
Motion isolation
7-zone coil system
Breathable cooling fabric
Fiberglass-free materials
#TOP 10

Novilla 12 Inch King Size Mattress

NAMSV10EDR
White
Novilla 12 Inch King Size Mattress Cover
Novilla 12 Inch King Size Mattress in a Box, Hypoallergenic & Back Pain Relief, Hybrid King Mattresses with Smarts Coils, Fiberglass Free CertiPUR-US Certified Colchones No Box Spring Needed

Features
Hypoallergenic & Certified Safe: Featuring CertiPUR-US Foam And An OEKO-TEX Cover, This Hygienic King Size Mattress Is Designed To Resist Allergens And Is Fiberglass-Free, Creating A Cleaner Sleep Space For Sensitive Individuals
Supports Back Pain Relief: This Supportive King Mattress Combines SmartS Coils And Contouring Foam To Actively Cradle Pressure Points And Promote Proper Spinal Alignment, Helping To Ease Discomfort For Side, Back, And Stomach Sleepers
Strong, Usable Edges: With Reinforced Perimeter Support, This Durable King Size Mattress Provides A Stable Sitting Edge And Prevents Roll-Off, Safely Maximizing Every Inch Of The Sleep Surface
Stays Cool All Night: The Breathable Hybrid King Mattress Uses AirBreeze Fabric To Wick Moisture And Enhance Airflow, Working To Dissipate Body Heat For A Consistently Cooler And Drier Sleep Surface
Certified Safe Materials: Designed With CertiPUR-US Certified Foam And OEKO-TEX Fabrics, Hybrid King Mattress Is Fiberglass-Free And Ideal For Healthy, Supportive Sleep. The King Size Mattress Delivers Safety And Comfort In One Reliable Package
Buying Guide Image

How to Choose The Right Split King Size Mattresses for Your Home

Introduction

When it comes to choosing a split king size mattress, there are a few factors to consider. From the size of the mattress to the type of mattress, the options can seem overwhelming. To help you make the best decision, here is a comprehensive guide on how to choose a split king size mattress.

Size

Split king size mattresses come in two sizes, one for each side. The two sides can be either twin XL or two full sizes, which are two separate mattresses that fit together. While a split king size mattress offers more space than a standard king size mattress, it’s important to measure the space in your bedroom to determine which size is best for you.

Comfort

The comfort level of a mattress is subjective, but there are a few things to consider when choosing a split king size mattress. First, consider the type of mattress you prefer. Memory foam mattresses are popular for their contour and support, while innerspring mattresses offer firmer support. Additionally, look for mattresses that are designed with cooling features, such as cooling gel or copper-infused foam.

Support

When it comes to support, look for mattresses that offer adjustable lumbar support. Split king size mattresses with adjustable lumbar support are designed to contour to your body and provide the perfect amount of support. Additionally, look for mattresses with high-density foam or pocketed coils for optimal support.

Price

The price of a split king size mattress can vary greatly, depending on the type and quality of the mattress. While it’s important to consider your budget, it’s also important to invest in a quality mattress that will last for years to come. Look for mattresses with long warranties and read customer reviews to ensure you are making a wise investment.

Conclusion

When it comes to choosing a split king size mattress, there are a few factors to consider. From the size of the mattress to the type of mattress, the options can seem overwhelming. To help you make the best decision, consider the size, comfort level, support, and price of the mattress. With a little bit of research, you’ll be sure to find the perfect split king size mattress for you.

Frequently Asked Questions (FAQs)

1. What mattress fits a split king?

In a split king, each individual can choose a twin XL mattress with the specifications they need to get a good night's sleep. Additionally, split king beds eliminate motion transfer since each person sleeps on their own individual mattress.

2. Is a split king mattress the same as two twins?

Split-king size mattresses are two separate twin XL beds placed next to one another in a frame. These beds are perfect for couples with very different sleep needs, as this set-up allows each sleeper to customize their side of the bed.

3. Is a split king the same as two twin XL?

Two Twin XL Beds = One Split King Bed To make it easy to visualize, you can simply picture two twin XL size beds pushed together. This is possible because a split king-size mattress is the same size as two twin XL mattresses put together!

4. Is a split king the same size as a king?

If you'd like to customize the bed's firmness based on each of your sleeping needs, a split king gives each partner their own side of the bed. Room size: A split king is the same mattress size as the average king bed, yet it is a bit easier to move around two smaller twin XL mattresses than one larger king.

Editor's Notes

During our split king size mattress research, we found 24 split king size mattress products and shortlisted 10 quality products. We collected and analyzed 840,132 customer reviews through our big data system to write the split king size mattresses list. We found that most customers choose split king size mattresses with an average price of $329.73.

The split king size mattresses are available for purchase. We have researched hundreds of brands and picked the top brands of split king size mattresses, including Novilla, Zinus, Sweetnight, MLILY, CH CHARME HOUSE. The seller of top 1 product has received honest feedback from 384 consumers with an average rating of 4.7.

Written by
Mark Greer Avatar

Mark Greer has been an excellent residential carpenter for eight years in Los Angeles and has complete knowledge of woodworking, power tools, and home DIY. He never misses a chance of the lookout for new features and innovations in popular and novel home appliances as an insightful writer.