Time To Sleep Like Never Before
Congrats on your SONU Sleep System mattress purchase! You're on the road to sleeping more comfortably than ever before. Follow the steps below to properly set up and enjoy your new mattress - and when you're done, head over to the Best Practices page to get the most out of your SONU!
Quick Reference Guide
Make sure your armpit is directly over the edge of the Comfort Channel. If you are too far towards the head of the mattress your weight may sink into the Channel. The Support Pillows in the Channel are only designed to support your neck and head. If you feel you are sinking in, please move down the bed so you maintain balanced support.
Rotate your main top pillow so that it supports your upper torso and your head at the same time. This technique will also bridge the gap between the Support Pillows and the side of the Comfort Channel, so you will be comfortably and evenly cradled while your arms enjoy the room within the Comfort Channel that they've always needed.


Let us walk you through how to set up and use your new SONU Sleep System properly in order to get the best results, find the best positions and enjoy the best sleep of your life. For setup instructions and best practices please watch the video above. You may also visit the Best Practices Started page and follow the steps below for more information.
Unbox your SONU Sleep System, place rolled up mattress where you will sleep, then carefully remove the outer plastic wrapping.
Note: To avoid accidentally damaging any mattress materials, cut the plastic only with the safe cutting tool provided with your SONU, not with scissors or a knife.
A computer rendering showing how to unwrap the SONU System mattress from its box then cut the plastic off with the included SONU saftey razor along a black dotted line.
Allow time for the mattress to unfold and expand fully, enabling all materials to take shape and provide full support.
Note: Expansion can take up to 72 hours to reach full supportiveness
A computer rendering showing to allow time to pass for the SONU mattress to take shape, denoted by a stopwatch icon next to the SONU.
Remove the SONU Support Pillows from the Comfort Channel, then move mattress into final place without grasping the Channel walls.
IMPORTANT: Always remove all pillows before moving the mattress. When moving it, lift only the main body area of the mattress to avoid damaging the Channel area.
A computer rendering showing to temporarily remove the Support Pillows from the Comfort Chanel of the SONU, denoted by arrows arcing to the sides of the mattress.
Position the head of the mattress flush against a wall or headboard so that the upper wall of the Comfort Channel is firmly supported.
IMPORTANT: Do not sleep on the mattress unless its headboard area is fully up against a solid supporting surface. If the Comfort Channel isn’t properly supported in this fashion, damage to the mattress and discomfort while sleeping may occur.
A computer rendering showing it is very important to push the head of the SONU mattress up against a solid wall or headboard, denoted by arrows pointing to close any gaps in this area.
Unpack the fitted sheet from the included SONU Sheet Set, align the Comfort Channels and fit it over your mattress.
Note: To help with positioning, all SONU fitted sheets have an interior care tag on the right side of the foot end. When in place, ensure the bottom of the Comfort Channel is completely flat by pulling slack into the Channel and pushing the corners into place.
A computer rendering showing to install the included white fitted sheet over the SONU mattress, denoted by downward arrows between the sheet abover and the mattress below.
Unpack the included Support Pillowcase Set, fit over every Support Pillow, then place back into the Comfort Channel.
IMPORTANT: The Support Pillowcase Set is included in the box in a separate package from the Sheet Set. Use the enveloped ends of the pillowcases to keep the Support Pillows securely enclosed. Stack the Support Pillows in sets of two, just as they arrived.
A computer rendering showing to put the Support Pillows back into place in the Comfort Chanel of the SONU, denoted by arrows arcing from the sides into the mattress.
Place your favorite pillows for sleeping on top of the SONU Support Pillows. It is now time to immerse yourself in comfort like never before...
IMPORTANT: Hug your pillow at an angle on top of the Support Pillows to bridge the Channel and support your head and upper torso, while your arms and shoulders enjoy extra space for maximum comfort and pressure relief that can only be achieved with a SONU. If your top pillow is too bulky or puts pressure on your neck, upgrade to the SONU Top Pillow Deluxe as it has been designed to pair with the Comfort Channel.

Tips: Review more sleeping position tips and best practices on the Best Practices page.
A computer rendering showing to put top pillows on top of the Support Pillows before laying down to rest, and a tip to turn the top pillows on an angle to bridge the gap in the Comfort Channel, to allow for the best night of pressure free sleep.
Warning: The SONU Sleep System is not for children 12 years of age or younger. Do not allow children to play or sleep on the mattress as it is designed for adults only.
Frequently Asked Questions
Contrary to what some might believe, the Comfort Channel is not conducive to numbness or tingling in your arm. When a body part “falls asleep”, as the saying goes, it is due to lack of circulation, or not enough blood reaching the body part. When your arm starts to tingle or loses feeling it is caused by a position you are in that is cutting off this necessary circulation that supplies oxygen to the nerves that run between your neck and your arm. Nerves have their own blood supply, so pressure on a nerve cuts off that blood supply and the nerve becomes starved for oxygen and shuts down. This happens often on traditional flat mattresses as you are forced to overextend your shoulders and arms into positions in which they are not meant to rest, which can cut off this circulation. While side sleeping on a flat mattress you are forced to apply unavoidable pressure on these body parts which results in the discomfort and lack of circulation that can cause this numbness. The SONU Sleep System’s patented Comfort Channel design helps to greatly relieve these pressures on your arms, and with this relief comes improved circulation and reduced chances of numbness.

Some may look at the SONU design and believe that because your arms are below the rest of your body, you may have an increased risk of circulation issues or numbness. This is a common misconception, but is not the case - here’s why. Your arms are naturally below your heart when you are upright, walking or sitting, throughout the day. Your arms never tingle in this position because they are receiving the correct amount of circulation. The Comfort Channel enables your arms to also rest below your heart, as if you were upright, resulting in your arms receiving the correct amount of circulation – which actually reduces the chances of circulation issues or numbness, compared to flat mattresses. We have designed the Comfort Channel system with all of this in mind. You will be impressed at the elevated level of comfort and truly deep sleep you will enjoy on your SONU, enabled in part by the improvement in circulation your body will experience.

For more information about the causes of circulation issues and numbness while sleeping, please visit: https://www.sleepfoundation.org/physical-health/numbness-in-hands-while-sleeping
When we set out on this journey to create the world’s first mattress for side sleepers that incorporates groundbreaking innovations unlike anything else on the market, we had to fight against the grain in an industry that hasn’t changed much in decades - all while battling dramatically increased cost of goods, shortage of labor and supply chain delays caused in large part by the pandemic. Other companies selling traditional flat mattresses that consist of only a few parts, buy low quality goods in bulk and manufacturer their products overseas, while incorporating corner-cutting processes into their production. By vast contrast, we create each SONU Sleep System by hand, as our design requires 26 custom components, top quality materials and the highest level of detail at which we hold ourselves as a brand. Every SONU is assembled by our skilled technicians in either our California or Connecticut factory locations, then thoroughly inspected before we package with care and FedEx to your door. This is why our products have a higher price than some others on the market – everything about SONU is entirely unique and of the highest quality – and you feel these incredible advantages every night when you immerse into comfort. You will discover that no other mattress even comes close.

We’ve partnered with the financing companies, Affirm and Koalafi, to be able to offer attractive monthly payment options. If this is something you’re interested in, it is good to note that Affirm extends your timeline and drops your monthly payment amount when your total is above $3,000. For example, if you select a queen size SONU and want to get our advertised $84 per month, then add an accessory to your cart (a Top Pillow Deluxe or our Mattress Removal option perhaps) so your total is just above $3,000 – then you will see the monthly payment price decrease. Once everything looks good, proceed by checking out and selecting ‘Affirm’ when you get to the payment section. Koalafi also offers payments over time with their lease-to-own program, which can be beneficial to customers who are still building credit. For details please visit the Financing page.

We just know you’ll be amazed with how our invention will transform your quality of sleep and rejuvenate you every night. We truly hope you join us and embark on a new chapter of comfort in your life.

Thank you so very much and sweet dreams,
The SONU Sleep Team

Back to top...
We are currently shipping mattresses within 3 to 5 days! SONUs are made-to-order, so on occasion it may take a little more time to get to you, as they’re not sitting in a warehouse collecting dust. The mattress, once compressed, will ship directly to your door. You will be emailed a tracking number as soon as your order ships.
FedEx will deliver your SONU to your door, no signature required.
You can pair the SONU with any platform, box spring, bed frame or simply the floor, as long as the headboard area of the mattress is flush against a solid surface for support. We also highly recommend using an adjustable foundation.
Every SONU’s height is 14 inches, while the width and length dimensions are the same as standard U.S. mattress sizes. The Comfort Channel dimensions describe the negative space in the mattress, while the Support Pillow dimensions describe a single pillow, of the 2 for Twin XL and 4 for Queen, King and Cali King, that are stacked in the Channel.

Twin XL
OVERALL: 38” x 80” x 14”
COMFORT CHANNEL: 30” x 14” x 10”
2 SUPPORT PILLOWS: 28” x 11.5” x 5.2”

OVERALL: 60” x 80” x 14”
COMFORT CHANNEL: 52” x 14” x 10”
4 SUPPORT PILLOWS: 24” x 11.5” x 5.2”

OVERALL: 76” x 80” x 14”
COMFORT CHANNEL: 68” x 14” x 10”
4 SUPPORT PILLOWS: 32” x 11.5” x 5.2”

Cali King
OVERALL: 72” x 84” x 14”
COMFORT CHANNEL: 64” x 14” x 10”
4 SUPPORT PILLOWS: 30” x 11.5” x 5.2”

Split King
OVERALL: 76” x 80” x 14”
2 COMFORT CHANNELS: 30” x 14” x 10”
4 SUPPORT PILLOWS: 28” x 11.5” x 5.2”

All dimensions above are in inches and formatted as follows: Width x Length x Height.
For more details visit our Size Guide page.
The SONU comes with a 100 Night Trial, so you can try it at home and decide if it's the right fit for you. If you don't love it, return it within 100 nights.

For more details visit the 100 Night Trial page.
The SONU is currently only available in the United States and Canada.
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.
Highly recommended!
Creates the perfect space for your arm if you're a side sleeper. Changed the way I sleep forever.
Justin S.
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.
Buffalo, NY
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.
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.
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.
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.
Chicago, IL
...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.
Designed To Work Together
The SONU Sleep System
$2,599 $1,899 ★★★★★

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

The SONU Sheets

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

The SONU Top Pillow Deluxe

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

Try For 100 Nights

If the SONU Sleep System somehow isn't for you, let us know and we'll come and get it.

  • Free Shipping

  • In-Home Trial Period

  • Hassle-Free Returns