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SONU Mattress Review – Side Sleeper Perfection

Sonu mattress review

Overview of the Sonu Mattress

Best Side Sleeper Mattress 2023
SONU Sleep System

Patented Comfort Channel and Support Pillow system molds to each sleeper’s desired position, greatly reducing pressures that are unavoidable with all other mattresses.

We earn a commission if you make a purchase, at no additional cost to you.

The Sonu mattress is a bed-in-a-box mattress that is designed to provide comfort and support for a good night’s sleep. It is made with three layers of foam: a top layer of cooling gel memory foam, a middle layer of transition foam, and a bottom layer of high-density support foam. The mattress is also encased in a breathable cover that is removable and machine-washable.

One of the key features of the Sonu mattress is its cooling technology. The cooling gel memory foam is designed to draw heat away from the body, which can be especially beneficial for people who tend to sleep hot. The mattress also has an open-cell design that allows for better airflow, further helping to regulate temperature.

In terms of support, the Sonu mattress is designed to provide a balanced level of firmness that is suitable for most sleep positions. The top layer of memory foam contours to the body, providing pressure relief for the hips, shoulders, and other sensitive areas. The middle layer of transition foam helps to distribute weight evenly, while the bottom layer of support foam provides a stable foundation.

Overall, the Sonu mattress is a well-designed, high-quality bed-in-a-box option that offers good support and cooling features. 

SONU Mattress Video Overview

Sonu Mattress Construction

Sonu construction

The construction details of the Sonu mattress can vary slightly depending on the specific model (Plush, Firm, and Hybrid), but here’s a general overview:

Overall depth: 14 inches


  • Woven with Phase Change Material (PCM) to wick away heat and regulate temperature.
  • Breathable and stretchy fabric for added comfort.

Comfort Layer:

  • Sonu Plush and Firm: Features 26 pieces of premium high-resilience CertiPUR-US® certified foams.
  • Sonu Hybrid: 28 pieces of premium high-resilience CertiPUR-US® certified foams with an additional layer of 6-inch individually pocketed coils for enhanced support and bounce.

Transition Layer:

  • A layer of transitional foam to provide support and contouring, easing the transition between the comfort and support layers.

Support Layer:

  • A high-density base foam for stability and durability.

Additional features:

  • 7-zone construction designed to provide targeted support for different pressure points in the body.
  • Reinforced perimeter for edge support to prevent roll-off.
  • Removable and washable cover for easy cleaning.

Here are some specific variations between the models:

  • Sonu Plush: Softer comfort layer with higher pressure relief for side sleepers.
  • Sonu Firm: Firmer comfort layer for back and stomach sleepers who prefer more support.
  • Sonu Hybrid: Combines the conforming comfort of memory foam with the bounce and support of pocketed coils, suitable for a wider range of sleepers.

It’s important to note that these are just the main construction details, and the specific materials and densities of each layer may not be publicly disclosed by Sonu.

The Sonu Mattress Patent

Sonu mattresses actually hold two patents related to their unique design features:

  • Patent number D906737: This patent is titled “Bed with negative space” and it specifically covers the design of the Sonu mattress’s Comfort Channel. This channel is the main distinguishing feature of the mattress, providing targeted pressure relief for side sleepers by allowing their shoulders and arms to sink in comfortably.
  • Patent number 10820718: This patent is also titled “Bed with negative space” and it delves deeper into the functionality and benefits of the Comfort Channel. It includes additional details about the specific dimensions and construction of the channel, as well as claims about its effectiveness in reducing pressure points and improving sleep quality for side sleepers.

It’s important to note that these patents only protect the specific design and functionality of the Comfort Channel feature, not the overall concept of a mattress or even other features in the Sonu mattress. This means that other companies could potentially create mattresses with similar benefits without infringing on Sonu’s patents.

Mattresses Similar to Sonu

inding a mattress similar to the Sonu will depend on what aspects of it you particularly liked or disliked. Here are some options based on different key features:

Similar sleep experience (targeted side sleeper support):

  • Purple Hybrid Mattress: Features a grid-like comfort layer that offers pressure relief similar to the Sonu’s Comfort Channel, though it’s more widely applicable to different sleep positions.
  • Saatva Zenhaven: A hybrid mattress with zoned support coils and multiple latex layers, providing good contouring and pressure relief for side sleepers.
  • Helix Sunset: An adjustable firmness hybrid mattress with multiple comfort layers, allowing you to customize the support for your side sleeping needs.

Similar design (negative space concept):

  • Sleep Number Climate 360 iQ Select: Not an exact negative space design, but it features an adjustable air chamber that can be customized to create a slight dip for pressure relief, similar to the Sonu’s approach.
  • Nest Bedding Lumbar Channel Topper: This add-on topper can be placed on any existing mattress to create a lumbar support channel, mimicking the Sonu’s targeted pressure relief feature.

Sonu Mattress Price, Trial, and Warranty:

Here’s a breakdown of the details you requested:


  • Sonu Plush and Firm: $1,699 (Queen size) – $2,799 (California King)
  • Sonu Hybrid: $1,899 (Queen size) – $2,999 (California King)


  • 100-Night Trial: You can try any Sonu mattress for 100 nights in your own home. If you’re not satisfied, simply return it for a full refund.
  • Important notes:
    • There’s a 60-day adjustment period before initiating a return.
    • A transportation fee may apply if you return your mattress after 60 days.


  • 10-Year Limited Warranty: Covers defects in materials and workmanship.
  • Exclusions: Normal wear and tear, improper use, and damage caused by pets are not covered.
  • Additional warranty options: Sonu offers extended warranties that cover additional issues, such as accidental spills and stains.

Additional Considerations:

  • Financing: Sonu offers financing options through Affirm, allowing you to make monthly payments over a term.
  • Free Shipping: Standard shipping is free within the continental United States.
  • Customer Service: Sonu offers customer service via email, phone, and live chat.

Sonu Accessories

Sonu offers a range of accessories designed to complement their unique mattress and enhance your sleep experience. Here’s an overview:

Essential Accessories:

  • Sonu Mattress Protector: Custom-made to fit the Comfort Channel, protecting your mattress from spills and extending its lifespan.

Comfort & Support:

  • Sonu Extra Support Kit: Provides additional support under your head, neck, and upper back for those who prefer a firmer feel or need targeted pressure relief.
  • Sonu Comfort Insert: Fills in the Comfort Channel, transforming the Sonu into a flat mattress, ideal for couples with different sleep preferences or those who prefer less negative space.
  • Sonu Top Pillows: Designed to work with the Comfort Channel, providing optimal head and neck support for side sleepers. Available in Deluxe and Standard versions.

Foundations & Adjustability:

  • Sonu Adjustable Base Deluxe: Offers customizable head and foot incline for ultimate comfort and positioning.
  • Sonu Adjustable Base: A more basic adjustable base option, still providing head and foot elevation.
  • Sonu Bed Frame: Solid platform with legs and headboard, designed to support the Sonu Sleep System.
  • Sonu Foundation: Solid platform designed to support the Sonu Sleep System.

Other Accessories:

  • Sonu Sheets Soft, Crisp, and Organic: Custom-made sheets in various sizes and colors, specially designed to fit the Comfort Channel and stay in place.
  • Sonu Mattress Duvet: Breathable and lightweight duvet made with eco-friendly materials, available in various weights.

Sonu Mattress Complaints

Sonu mattresses, like any product, have received both positive and negative feedback from customers. Here’s a summary of some of the most common complaints found online:

  • Comfort Channel: While the Comfort Channel is designed to provide targeted pressure relief for side sleepers, some users have found it to be too narrow or uncomfortable, causing pressure points and pain.
  • Edge support: Some reviewers have reported feeling like they might roll off the edge of the mattress, especially if they sleep near the edge of the bed or are of a smaller size.

  • Heat retention: Some customers have complained that the Sonu mattress sleeps hot, particularly the hybrid model. This could be due to the memory foam layer which is known to retain heat.

  • Durability: A few reviewers have mentioned concerns about the mattress’s durability, with some reporting sagging or indentations after a short period of use.

  • Customer service: There have been some isolated complaints about customer service, with some customers reporting difficulty getting in touch with Sonu or receiving unhelpful responses.

It’s important to keep in mind that everyone’s experience is different, and what one person finds uncomfortable another person might find perfectly fine. It’s also worth noting that Sonu offers a 100-night trial period, so you can try out the mattress for yourself and see if it’s a good fit before you commit to buying it.

Overall, Sonu mattresses seem to be a good option for some side sleepers, but they may not be for everyone. If you’re considering buying a Sonu mattress, it’s important to read the reviews carefully and weigh the pros and cons to see if it’s the right choice for you.

Best Side Sleeper Mattress 2023
SONU Sleep System

Patented Comfort Channel and Support Pillow system molds to each sleeper’s desired position, greatly reducing pressures that are unavoidable with all other mattresses.

We earn a commission if you make a purchase, at no additional cost to you.

Sonu Sleep vs. Nectar

Nectar and Sonu Sleep are both online mattress companies that offer high-quality foam mattresses with similar features. However, there are some differences between the two brands that may influence your purchasing decision:

  1. Construction: Nectar mattresses are made with four layers of foam, including a quilted memory foam cover, gel memory foam, adaptive hi-core memory foam, and a breathable base layer. Sonu Sleep mattresses, on the other hand, are made with five layers of foam, including a cooling top layer, responsive memory foam, zoned transition foam, a supportive layer, and a durable base foam layer.

  2. Firmness options: Nectar mattresses come in one firmness option, which is medium-firm. Sonu Sleep mattresses offer two firmness options, including medium-firm and firm.

  3. Trial period: Nectar mattresses come with a 365-night trial period, which is one of the longest in the industry. Sonu Sleep mattresses come with a 100-night trial period.

  4. Warranty: Nectar mattresses come with a lifetime warranty, while Sonu Sleep mattresses come with a 10-year warranty.

  5. Price: Nectar mattresses are generally more affordable than Sonu Sleep mattresses, but the exact price will depend on the size and model you choose.

Ultimately, the choice between Nectar and Sonu Sleep will depend on your personal preferences and budget. Both companies offer high-quality foam mattresses with excellent features, so it’s worth comparing the two brands to see which one is the best fit for you.

Sonu Mattress vs. Purple Mattress

It’s difficult to compare Sonu and Purple directly since they are two different types of products from different companies. Sonu is a mattress brand that offers several different models of memory foam mattresses, while Purple is a company that specializes in unique, high-tech mattresses made with their patented “Hyper-Elastic Polymer” material.

Here are some key differences between Sonu and Purple mattresses:

  1. Materials: Sonu mattresses are made with different combinations of memory foam, polyfoam, and other materials, while Purple mattresses are made with a unique polymer grid material that is designed to be both supportive and pressure-relieving.

  2. Firmness: Sonu mattresses come in different levels of firmness, while Purple mattresses are typically medium-firm.

  3. Cooling: Purple mattresses are known for their cooling properties, as the polymer grid material allows for plenty of airflow and prevents heat buildup. Sonu mattresses may also have cooling properties, depending on the materials used.

  4. Price: Sonu mattresses are generally more affordable than Purple mattresses, although prices can vary depending on the model.

Best Side Sleeper Mattress 2023
SONU Sleep System

Patented Comfort Channel and Support Pillow system molds to each sleeper’s desired position, greatly reducing pressures that are unavoidable with all other mattresses.

We earn a commission if you make a purchase, at no additional cost to you.

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