Split King memory foam mattresses starting at $1348

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Split King Size Memory Foam Mattresses: Personalized Comfort and Support

Q: Do you have any showrooms where I can try out the mattresses?

Yes, we have a showroom located in Scottsdale, Arizona at the Optima Camelview . We encourage you to visit us and experience the comfort of our mattresses in person. Our knowledgeable sleep experts can answer any questions you have and help you find the perfect mattress for your needs.

Experience the ultimate in individualized comfort with our Split King size memory foam mattresses. Designed for couples with different sleep preferences.

Find Your Perfect Mattress.

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Why Amerisleep's Memory Foam is the Best Choice

Amerisleep mattresses are designed with spinal health in mind. The zoned support system helps maintain proper alignment, which is crucial for preventing back pain.

Dr. Jordan Burns, D.C.

As a sleep specialist, I recommend Amerisleep mattresses to my patients because of their superior comfort and support. The Bio-Pur® foam is breathable and doesn’t trap heat like traditional memory foam.

Dr. Colleen Ehrnstrom, MD

I’ve been impressed with Amerisleep’s commitment to using eco-friendly materials. Their Bio-Pur® foam is plant-based and has a lower environmental impact.

Dr. Miho Tanaka, MD

For patients with back pain, I often recommend memory foam mattresses that offer good spinal support. Amerisleep mattresses are a great option because they contour to the body and relieve pressure points.

Dr. Brian Nwannunu, MD

A good mattress is essential for quality sleep, and Amerisleep mattresses deliver on both comfort and support. I appreciate their focus on using high-quality materials.

Dr. Sasha Haddad, MD

As a physical therapist, I see firsthand the importance of proper sleep posture. Amerisleep mattresses help promote healthy spinal alignment, which can reduce pain and improve sleep quality.

Dr. Jennifer Miller, PT

The AS3 feels like sleeping on a cloud, but I’m never overheated. Perfect combo!

Christina Serrano

@chrissymarieblog

I always thought memory foam was too hot until I found Amerisleep. Their foam is breathable and super supportive.

Customer Testimonial

I’ve slept like a baby ever since I’ve been on this mattress.

Victor Saude

@mvft.fit

Why Memory Foam? The Benefits Explained

Memory foam's greatest strength lies in its ability to conform to your unique shape, cradling your curves and distributing weight evenly, particularly around sensitive areas like your shoulders, hips, and back. This targeted pressure relief is a key reason why so many people find memory foam mattresses incredibly comfortable. In a Split King size, you get all the benefits of memory foam with the added advantage of individualized comfort for each sleeping partner.

Low Motion Transfer: If you share your bed with a partner, you’ll appreciate memory foam’s ability to isolate motion. Unlike traditional innerspring mattresses, memory foam absorbs movement, preventing it from rippling across the bed. With a Split King, motion transfer is virtually eliminated as each partner sleeps on their own separate mattress.
Silent Support: Memory foam mattresses are virtually silent, eliminating the squeaks often associated with traditional springs.
Even Weight Distribution: Memory foam conforms to your body’s curves, distributing your weight evenly across the mattress surface. This promotes healthy spinal alignment and reduces aches and pains.
Enhanced Durability: High-quality memory foam, like the Bio-Pur® used in Amerisleep mattresses, is designed to be more durable than traditional poly-foam, resisting sagging and indentations.

What Makes Our Memory Foam Different

Bio-Pur® Foam: Our plant-based, open-cell memory foam sleeps cooler and adapts to your movements without making you feel stuck.
HIVE® Technology: Zoned support provides firmer reinforcement under your lower back and hips, with softer cradling around your shoulders and legs.
Bio-Core® Base: A high-density foam base prevents sagging and ensures long-lasting performance.
Active Flex (AS5): An extra layer of plushness and responsiveness exclusive to our AS5 model for those seeking maximum cushioning.

Ready for a great night's sleep?

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Is a Split King Size Memory Foam Mattress Right for You?

Our Split King Size Memory Foam Collection is ideal for:

Couples with Different Sleep Preferences

Where one partner prefers a firmer mattress and the other prefers a softer one.
Couples with Adjustable Beds

Allowing each partner to independently adjust their side of the bed to their preferred position.
Restless Sleepers

Minimizing motion transfer to the point where it’s virtually undetectable.
Side & Combo Sleepers

Enjoy the exceptional pressure relief and contouring of memory foam, each on your own firmness level.
Back Pain Sufferers

Choose different firmness levels on each side to accommodate different spinal support needs.
Light Sleepers

Who are easily disturbed by noise or movement during the night. The motion isolation properties of memory foam are maximized in a Split King setup.

A Split King size memory foam mattress offers the ultimate in personalized comfort, support, and flexibility for a truly restorative sleep experience.

How Much Do Split King Size Memory Foam Mattresses Cost?

Quality memory foam beds can range from $1200–$3600+, depending on factors like:

Foam Density & Thickness: Thicker comfort layers and higher foam density often cost more but offer superior pressure relief and durability.
Cooling Features: Advanced cooling technologies like plant-based foam, open-cell designs, and special covers can add to the cost.
Zoned Support: Features like HIVE® technology, providing targeted support, contribute to both cost and comfort.
Warranty & Durability: Longer warranties often indicate higher-grade materials and construction, which can influence the price.

Amerisleep Split King size memory foam mattresses start at about $1348 with promotions—delivering top-tier comfort, eco-friendly construction, and robust warranties.

Split King Memory Foam Mattress Comparison Chart

Feature	AS1	AS2	AS3	AS4	AS5
Firmness	Firm	Medium-Firm	Medium	Plush	Ultra-Plush
Feel	Solid, Sturdy	Supportive with a touch of give	Balanced comfort and support	Soft, Cloud-Like	Our Softest, Most Luxurious
Profile	10"	12"	12"	12"	14"
Ideal For	Stomach Sleepers	Back Sleepers, Heavier Individuals	All Sleepers	Side Sleepers	Side Sleepers, Joint Pain
Support	8" Bio-Core® Base	7" Bio-Core® Base	7" Bio-Core® Base	7" Bio-Core® Base	7" Bio-Core® Base
Cooling	Bio-Pur® foam	Bio-Pur® foam	Bio-Pur® foam	Bio-Pur® foam	Bio-Pur® foam
Motion Isolation	Good	Good	Excellent	Excellent	Excellent
Edge Support	Good	Good	Excellent	Good	Good
Price (Split King)	$1348	$1748	$2148	$2148	$3348
Shop Now	Shop the AS1	Shop the AS2	Shop the AS3	Shop the AS4	Shop the AS5

AS3: Our Best-Selling Memory Foam Mattress

The AS3 strikes the perfect balance of comfort and support, making it our most popular memory foam mattress. Its medium feel suits a wide range of sleepers. With 3 inches of our Bio-Pur® foam and zoned HIVE® technology, you get:

Pressure relief that adapts as you change positions
Enhanced airflow for cooler sleep
Targeted support for optimal spinal alignment
Minimal motion transfer, even with a partner

"The AS3 feels like sleeping on a cloud, but I’m never overheated. Perfect combo!” — Christina Serrano (@chrissymarieblog)

Split King size AS3 mattress shipping box

Choosing the Right Memory Foam Mattress

Watch as Dr. Jordan Burns, a practicing chiropractor, shares his expert tips on choosing a memory foam mattress for optimal comfort and support:

Key takeaways from Dr. Burns:

Choosing the right mattress firmness is crucial for spinal alignment. Learn more about mattress firmness.
Proper pillow support is essential for neck pain relief. Learn how to choose the right pillow for neck pain.
Sleeping position can significantly impact back pain. Learn about the best sleeping positions for lower back pain .

Additional tips

Consider your sleeping position: Side sleepers often prefer softer to medium mattresses (AS3, AS4, AS5), while back and stomach sleepers may need a firmer option (AS1, AS2).
Think about your weight: Heavier individuals may need a firmer mattress for adequate support, while lighter individuals may prefer a softer feel.
Look for cooling features: If you sleep hot, choose a memory foam mattress with open-cell construction, plant-based materials, or other cooling technologies.

Choosing the Right Size: Is a Split King Mattress Right for You?

Our Split King size mattresses offer the same overall dimensions as a standard King size (76 inches wide by 80 inches long), but with the unique advantage of two separate mattresses, each measuring 38 inches wide by 80 inches long. This configuration provides unparalleled customization for couples, allowing each partner to choose their preferred firmness level and mattress type. To determine if a Split King size is right for you, consider your individual sleep preferences, whether you use an adjustable bed, and the size of your bedroom. For a detailed comparison of all mattress sizes, including dimensions and recommendations, visit our comprehensive Mattress Size and Dimensions Guide.

Frequently Asked Questions

Are memory foam mattresses hot to sleep on?

Traditional memory foam can trap heat, but Amerisleep’s Bio-Pur® foam is open-cell and more breathable, reducing heat retention.

How long do memory foam mattresses last?

High-quality foam like ours often lasts 8–10+ years, thanks to robust density and supportive base layers. We back our mattresses with a 20-year warranty.

Which memory foam firmness is right for me?

It depends on your sleep position. Side sleepers often like medium to plush (AS3, AS4, AS5). Back sleepers may prefer medium-firm (AS2). Stomach sleepers might opt for AS1. Take our mattress quiz to find your perfect match!

Do memory foam mattresses smell (off-gassing)?

Our foams are low VOC and CertiPUR-US® certified. Any “new mattress smell” typically dissipates within days, if at all.

Can I use a regular box spring with a memory foam mattress?

A solid foundation or slatted base is usually recommended. A worn or old box spring might cause sagging. Learn more about whether a bad box spring can ruin a mattress.

How does memory foam help with back pain?

It cradles the spine, relieving pressure in the lumbar area, promoting better alignment—especially with zoned support (HIVE®).

Do I need a mattress protector?

While not mandatory, a protector helps keep the mattress clean and prolongs its lifespan.

Are your memory foam mattresses adjustable-base friendly?

Yes. All our foam models bend easily with adjustable bases—no damage, no compromise on support.

What should I do with my old mattress?

Many charities accept mattress donations. You can also check with your local waste management company for recycling options. We also offer old mattress removal services in select locations. Learn more about mattress donation options.

Do you have any showrooms where I can try out the mattresses?

Yes, we have a showroom located in Scottsdale, Arizona at the Optima Camelview. We encourage you to visit us and experience the comfort of our mattresses in person. Our knowledgeable sleep experts can answer any questions you have and help you find the perfect mattress for your needs.

What size sheets do I need for a Split King mattress?

You will need two Twin XL size sheets for a Split King mattress. Each Twin XL sheet typically measures 38 inches wide by 80 inches long. You will also need a King size comforter or duvet and a King size fitted sheet.

How much does a Split King size memory foam mattress weigh?

Each side of the Split King size memory foam mattress will weigh around the same as a Twin XL size mattress. The weight can vary depending on the specific model and materials used. On average, each side of the Split King size memory foam mattress from Amerisleep weighs between 40 and 70 pounds.

What is the difference between a King and a Split King?

A standard King size mattress uses one large mattress, while a Split King uses two separate Twin XL mattresses. This allows for individualized comfort and is ideal for adjustable beds. Both King and Split King mattresses have the same overall dimensions. See our Mattress Size and Dimensions Guide for more details.

Experience Personalized Comfort on a Split King Size Memory Foam Mattress

Enjoy the ultimate in individualized comfort and support with our Split King Size Memory Foam Collection. Customize each side of the bed to your unique preferences and experience the difference of plant-based Bio-Pur® foam.

Shop Split King Memory Foam Collection

This page was written by Rosie Osmun, a Certified Sleep Science Coach (CSSC) with over 15 years of experience in the health and sleep industries. Rosie's work has been featured in publications such as Healthline, Byrdie, Lifehacker, Men's Journal, Eating Well, Medical Daily, and BedTimes Magazine. She is passionate about helping people improve their sleep through informed mattress choices. This page was reviewed by the Amerisleep Product Development Team, which possesses over 20 years of combined experience in mattress design and sleep technology.

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