What's Included

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Comfort Channel Paired

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Balanced & Level

If a sleeper is experiencing a sinking feeling when using the Comfort Channel or doesn’t feel level during the night, the Extra Support Kit will remedy these situations.

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Customizable Support

For Queen, King and Cali King mattress sizes, the Extra Support Kit comes in 2 halves for easy installation and individualized support configurability under each side of a SONU mattress, totaling 4 pieces in each kit. This means sleepers can enjoy different areas of support on each side of the bed. (The Twin XL kit contains a single wedge and panel, totaling 2 pieces.)

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Hypoallergenic & Durable

Made from firm, high-resiliece foam, the Extra Support Kit is durable and hypoallergenic.

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Kit Contents

Twin XL: 1 Wedge (38” x 24” x 3”) & 1 Panel (38” x 6” x 2”), Queen: 2 Wedges (30” x 24” x 3”) & 2 Panels (30” x 6” x 2”), King: 2 Wedges (38” x 24” x 3”) & 2 Panels (38” x 6” x 2”), Cali King: 2 Wedges (36” x 24” x 3”) & 2 Panels (36” x 6” x 2”).

verified

1 Year Warranty

Guaranteed high-quality construction that lasts.

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Free Shipping

Your order includes shipping to anywhere within the continental U.S.
* Extra charge to ship to Alaska and Hawaii. We cannot ship to PO Boxes or APOs.

See Terms & Conditions for Law Labels and more details.

The SONU Extra Support Kit

Name: The SONU Extra Support Kit
Brand: SONU Sleep
SKU: SS483
Price: 69.0 USD
Availability: InStock
Rating: 4.8 (215 reviews)

★★★★★

The SONU Extra Support Kit is designed to bolster support under the head, neck and upper back by angling up the Comfort Channel of the SONU Sleep System mattress. The kit also includes an extra layer to customize support as needed, whether to further increase lift under the Comfort Channel or for additional lumbar, hip or lower back support.

PAY NOW

$69

PAY MONTHLY

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OUR BIGGEST DEAL EVER

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SONU Sleep System

★★★★★

Purchase Any Mattress &
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SONU Bed Frame

★★★★★

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SONU Base

★★★★★

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SONU Muslin Blanket

★★★★★

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SONU Comforter

★★★★★

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SONU Duvet Cover Set

★★★★★

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SONU Comfort Insert

★★★★★

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Made for SONU

1 Year Warranty

What's Included

EXPAND ALL

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Comfort Channel Paired

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Balanced & Level

If a sleeper is experiencing a sinking feeling when using the Comfort Channel or doesn’t feel level during the night, the Extra Support Kit will remedy these situations.

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Customizable Support

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Hypoallergenic & Durable

Made from firm, high-resiliece foam, the Extra Support Kit is durable and hypoallergenic.

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Kit Contents

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1 Year Warranty

Guaranteed high-quality construction that lasts.

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★★★★★

“I'm consistently getting better sleep than I have in years and my shoulders, arms, and hands feel great in the morning. If you're pondering the functionality of this mattress, I can tell you this is legit technology and a solid quality build.”

Robert S.

Hillsboro, OR

Time to Sleep Like Never Before

Watch the videos below to learn how you're about to get the best night's sleep of your life.

Finally Rest Naturally

Unmatched Side Sleeping Comfort

The SONU Experience

Life with a SONU

Game Changing Innovations

Trusted Reviews From Side Sleepers Nationwide

Shoppers and their reviews verified by Fera.ai

Thank YOU! Best mattress out there.
★★★★★
“After being a gymnast for 15 years, I haven't felt this much relief from the pain in my shoulders and my hips while sleeping!! Thank you!”
Steph C.
VERIFIED SHOPPER

YUMA, AZ

Highly recommended!
★★★★★
“Creates the perfect space for your arm if you're a side sleeper. Changed the way I sleep forever.”
Justin S.
VERIFIED SHOPPER

ENTERPRISE, MS

AMAZING
★★★★★
“So I actually own one of these. It's AMAZING. Yes it will take you a few weeks to get "used" to it... But that said, you will be AMAZED at how great your shoulders feel in the morning. Just unreal. Like sleep a full 8 hours without waking up type of sleep.”
Jason R.
VERIFIED SHOPPER

Buffalo, NY

Excellent!
★★★★★
“I have very bad neck and back issues and this mattress is a dream! If you are a side sleeper you will love it and even if you like to sleep on you back you will love it! Very comfortable and totally worth the money!”
Grace L.
VERIFIED SHOPPER

MARTINSVILLE, VA

Fantastic!
★★★★★
“i have suffered from shoulder pain while sleeping for several years, i had just about given up... then i saw this bed and decided one last try. i can't begin to explain what it feels like to sleep through an entire night... for the first time in 20 years the first weekend i had it. I'm so impressed with this bed... because what they are making is making a difference in people's lives.”
Crystal G.
VERIFIED SHOPPER

NEW PALEST., IN

Lives up to the hype
★★★★★
“This comfort channel they made is next level. I never imagined that I would be able to put my arm in the mattress. Takes all the pressure off my shoulder, which I so so need. YES”
Kim J.
VERIFIED SHOPPER

CAPE CORAL, FL

Highly recommended!
★★★★★
“I’m a side sleeper and I used to wake up with a dead feeling arm from lying on it all night. Finally a mattress with a pocket for my arm. I tried all the pillows and even very expensive mattresses in the past, but nothing cured my circulation problems until I got the sonu sleep mattress. I love it!”
Nic D.
VERIFIED SHOPPER

Chicago, IL

Fantastic!
★★★★★
“...Sonu mattresses are in a league all by themselves. This is the most comfortable bed I have ever slept on. I have no more shoulder pain and numbness. I can now sleep through the night and not wake up in pain. If anyone is even thinking about getting a Sonu sleep system don’t think anymore. Pull that trigger. I 100% gaurentee you will not be disappointed.”
Christopher B.
VERIFIED SHOPPER

GRANTVILLE, PA

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Frequently Asked Questions

The Extra Support Kit solves any issue that a sleeper may have with a lack of support in the upper torso, shoulders, neck and head area by using a specifically engineered wedge with panel extension shape that pairs with the Comfort Channel of the SONU Sleep System mattress, as well as an additional panel shape for customization of further support where needed. If a sleeper is experiencing a sinking feeling when using the Comfort Channel or doesn’t feel level during the night, the Extra Support Kit will rectify these situations.

For Queen, King and Cali King mattress sizes, the Extra Support Kit comes in 2 halves for easy installation and individualized support configurability under each side of a SONU mattress, totaling 4 pieces in each kit. This means you and your partner can enjoy different areas of support on each side of the bed. (The Twin XL kit contains a single wedge and panel, totaling 2 pieces.)

The Extra Support Kits are sized precisely for their corresponding mattress sizes.

Twin XL
1 Wedge: 38” x 24” x 3”
1 Panel: 38” x 6” x 2”

Full
2 Wedge: 27” x 24” x 3”
2 Panels: 27” x 6” x 2”

Queen
2 Wedges: 30” x 24” x 3”
2 Panels: 30” x 6” x 2”

King
2 Wedges: 38” x 24” x 3”
2 Panels: 38” x 6” x 2”

Cali King
2 Wedges: 36” x 24” x 3”
2 Panels: 36” x 6” x 2”

All dimensions above are in inches and formatted as follows: Width x Length x Height.

1. Install. Place the 2 inch thick foam wedge under your SONU mattress with the thicker end flush against the headboard area. Make sure that the wedge is positioned parallel to your mattress to provide support evenly across the Comfort Channel.

2. Position. If your mattress is a Queen, King or Cali King size, repeat step 1 for both wedges in your kit – one under each side of the bed. Make sure both wedges are positioned fully under the mattress, symmetrically and parallel to the headboard area, spanning the entire width of the mattress.

3. Customize. Place the 1 inch thick foam panels below your lower back area for added lumber support if needed. Or, after sleeping on and testing the feel of the foam wedge, more support is desired, move the foam panel to where additional support is needed.

SEARCH ALL FAQs

What Is A Negative Space Mattress?

Photo of the SONU Sleep System from the foot of the mattress with light and dark grey fabric on a black background.

THE COMPLETE GUIDE

Learn about the reasons we created this unique sleep system, how your old mattress falls short, and the game changing benefits that you'll enjoy every day with a SONU.

Read this informative article and others on our blog, Comfort & Slumber, by The SONU Editorial Team.

THE SONU BLOG

Chiropractor Recommended

“The SONU mattress allows for dramatic improvement in ergonomic support, resulting in better sleeping patterns, and an increase in the patient’s comfort and overall wellbeing.”

- Dr. James Hogan

Chiropractic Physician
Los Angeles, California

Read more about Dr. Hogan and how The SONU Sleep System can help you in the same ways as his patients.

MEET DR. HOGAN

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Customized Comfort

The SONU Comfort Insert fills in one side of the Comfort Channel, making the SONU Sleep System more akin to a flat mattress, but still with give for your shoulders. This versatility can be helpful for many scenarios including couples who sleep differently from one another (e.g. a side sleeper and a back sleeper) and for those who simply prefer less space in the Comfort Channel.

THE SONU COMFORT INSERT

NATCA Approved

The National Air Traffic Controllers Association has selected SONU as their official partners in the sleep industry, giving their members higher quality rest for their highly important careers.

Read more about NATCA and how the SONU Sleep System is helping members of the aviation industry across the nation.

ABOUT NATCA

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SONU Social

“OMG. I'm going to cry with joy!!! I am ordering this NOW!”

Jason R.

“This is the mattress of my dreams. 😭😭”

@angelareed05

“I need this more than anything I've ever needed”

Stephanie B.

“whoever designed this needs a special place in heaven lol”

Antuwan C.

“My shoulders start crying tears of joy when i seen this”

@jondoemrnobody

“Zach F. the perfect mattress”

Ali F.

“I need this!!!!!! My arm hurts or is asleep every morning!!!!”

Rachel S.

“Jake - Game changer! 😳😍”

Lewis E.

“@marc.munoz.77 Finally something for folks with broad shoulders who want to sleep on the side.”

@mechkitten

“Genius. Seriously what I've wanted.”

Hailey M.

“Omg what a great idea. Now I can sleep on my belly without my arms all weird under me 🤣”

Krissie S.

Made In The U.S.A.

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The SONU Sleep System was designed and developed in California, and is manufactured only in the United States - made with the highest quality materials and attention to detail for side sleepers everywhere.

* SONU Bedding and several SONU Supports are imported products. All other SONU products are made in the United States.

Designed To Work Together

The Patented SONU Sleep System Mattress with Comfort Channel against a white background.

The SONU Sleep System

Hybrid

$2,099 $1,899 ★★★★★

It is finally time to immerse into comfort, and sleep like never before.

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The SONU Sleep System's custom made cooling sheets, folded & stacked in different colors. They are white, cream and slate, from top to bottom.

The SONU Sheets

$159 ★★★★★

Soft, cooling and sustainable, with the Comfort Channel built in to fit your SONU.

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A Top Pillow made specifically for the SONU Sleep System against a white background.

The SONU Top Pillow Deluxe

$129 ★★★★★

The perfect amount of support and malleability to complement your SONU.

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