Zinus Sleep Master Ultima Comfort Memory Foam Mattress (2022 Reviews & Ratings)

zinus sleep master

Zinus Sleep Master Ultima Comfort Memory Foam Mattress


A natural, eco-friendly mattress created responsibly with BioFoam layers, the Zinus Sleep Mater Ultima is comfortable memory foam mattress that’s great for pressure relief. Our team evaluated this mattress and found it an excellent bed to sleep on. See why by reading our full review here.

Zen. Yoga. Tai Chi. Meditation. These practices are not just about promoting good health. They’re not just about conjuring lovely mental images of breathtaking landscapes, fresh air, and aquamarine lakes.  

These words equate to inner peace, tranquility, and bliss. It’s because these concepts actually enhance harmony. It could be harmony between humans and the forces of nature. It could be a harmonious relationship between the physical, mental, and spiritual aspects of yourself. 

For veteran bed-in-a-box company Zinus, they incorporate the mantra of improving harmony between the client and their products. Let’s check out one of their top sellers—the Sleep Master Ultima Comfort Memory Foam mattress—and see how the bed synergized with the sleeper.

zinus sleep master

Zinus: Facing a Brave World.

It takes audacity to claim the word “ultimate” and its variations. We are definitely impressed by sleep furniture companies who proudly and confidently claim that label in the midst of tough competition. One of those companies is Zinus, a company whose humble beginnings was in Seoul, South Korea.

Zinus was founded by entrepreneur and adventurer Youn Jae Lee who first ventured into business in 1979 by building tents. Since then, he expanded his business to include beds, mattresses, and sofas. Today, more than 10 million people are using Zinus products. 

Zinus first launched their bedding products in 2004. The business grew rapidly, and in the next few years, they were able to use their own state-of-the-art patented materials. These include SmartBase compression packing technology, Biofoam material, EcoFoam material, and Get Technologies.

In 2010, the company opened their US warehouse to enable domestic operations. Since then, they were able to operate distribution centers in both Eastern and Western seaboards of the country. They further expanded their locations to 6 different countries all over the world.

The coolest thing about Zinus is that they aim to create harmony of the world and the human body. To do this, they infuse their products with green tea, olive oil, charcoal, and other natural ingredients. That way, they don’t have to use toxic chemical flame retardants, formaldehyde, and phthalates, which other bedding companies use. You can definitely snooze off with that peaceful feeling that you’re going to be safe.

Creating a harmonious relationship between their products and their human clients is paramount to Zinus. Thus, they ensure that their products are ergonomic, stylish, comfortable, and easy to assemble. 

Finally, Zinus has adapted processes, procedures, and technologies that increase the effectiveness and efficiency of their work. As a result, they can manufacture quality products at very reasonable prices. Believe it or not, many of their top sellers are under $500! This just shows that having and experiencing great things in life don’t have to be expensive.

Zinus Sleep Master Ultima Comfort Memory Foam Construction

Now, let’s check out one of their top-selling products, the Zinus Sleep Master Ultima Comfort Memory Foam Mattress. The Sleep Master Ultima Comfort Memory Foam Mattress is a modern all-foam mattress made from a company that has over 25 years of experience in the bed manufacturing industry. According to clients and sleep testers, it provides excellent comfort and medium-firm comfort level even without coil support.

Is this really the ultimate bed? Can the company’s harmony-driven initiative stand up to the fierce competition from those who are also claiming the same “ultimate” comfort, engineering, or price?

Well, let’s lie down and find out!

zinus sleep master mattress


The first stage of comfort comes from the soft knitted Jacquard cover. Jacquard is a kind of fabric that is woven using a Jacquard loom. Various materials such as cotton, polyester, or silk are used. Traditionally, Jacquard fabric features a raised pattern such as brocade or Matelasse.

Moisture-wicking and breathable, the cover allows cool air to flow freely. Due to the nature of jacquard weaving, the cover resists moisture, mold, mildew, and stains. In addition, it doesn’t fade easily.

Top Layer

Before we talk about the foam layers, let’s briefly discuss what kind of foam Zinus uses on their beds. As we mentioned before, Zinus wants to create harmony between nature, the human body, and their products. As such, they made a specially formulated foam called BioFoam.

Introduced and patented in 2007, BioFoam infuses organic products such as natural seed oil, green tea, and active charcoal into memory foam. This naturally combats the growth of mold, mildew, and allergens.

Standard memory foam is inherently hot. Many foam bed manufacturers try to solve this problem by adding open cells or infusing cooling gels in the foam. In the case of the Zinus Sleep Master Ultima, the infusion of plant oils also makes the foam cool by keeping the sleeper’s body temperature even. All foam layers in this mattress are made of BioFoam.

Now, let’s start. The top layer of the Zinus Sleep Master Ultima is made up of a 3-inch breathable memory foam that has a low response to pressure. That means it easily conforms to every curve—or bulge—of your body. It offers not just that heavenly softness but also pinpoints pressure support to the areas of your body like the lumbar area, hips, and shoulders.

Comfort Layer

Following the top layer is a breathable 3-inch comfort foam. This foam layer is denser, counteracting the softness of the top memory foam layer with an adequate level of bounce. This prevents the sleeper from sinking too deeply into the mattress. In addition, the springiness of the comfort foam allows the top layer to quickly spring back into its normal state after the mattress is subjected to pressure and weight.

Finally, the comfort foam provides pressure relief as it provides firm support to your hips, shoulders, elbows, and lower back.

Base Layer

The mattress’ base layer is made up of high-density, ultra-supportive Biofoam base foam. This thick 6-inch foam provides the bulk of the mattress’ support and firmness. It is also the primary component that gives the Zinus Sleep Master Ultima its durability and form.

More Ultima Extras

Zinus wants their customers to have a pleasant and harmonious experience with their products. Thus, with the Zinus Sleep Master Ultima Comfort Memory Foam Mattress, you aren’t just rewarded with a high-quality bed.

Certifications, Patents, and Awards

Zinus ensures that the mattress is free of harmful chemicals—from the harvesting of raw materials, processing of the foam, manufacturing the bed, to shipping to you. You are assured of a chemical-free mattress with these certifications and patents

  • Evergreen – maintains the product’s freshness through natural green tea extract
  • BioFoam – foam made of natural substances such as plant oil
  • ActiV Charcoal – absorbs moisture and eliminates odors
  • GET Technologies – saves power during manufacturing
  • CertiPur-US certification – ensures that the product is free of ozone depleters, heavy metals, and other toxic substances

Finally, Zinus innovation and constant “create harmony” design mindset earned them a lot of recognition. Check out their awards and products that have won significant accolades.


Zinus products are already affordable, but what if you really got a big hole in your wallet? What if you need to buy a few more of their wonderful products but don’t have the cash for it?

Well, no worries because Zinus has partnered with Affirm to give you a break. Check out their flexible payment options to make it easier on the budget for you. The approval of your payment plan is based on a credit check.


Shipping doesn’t cost you a cent if you’re living in the US 48 contiguous states. Shipping is done via FedEx Ground. Note that while shipping is free of charge, the states of California, Connecticut, and Rhode Island may charge you with a state-related recycling fee.

Order Tracking

Excited to get your Zinus Sleep Master Ultima Comfort Memory Foam Mattress? You can check the status of your purchase using their order tracker. Just enter your tracking number and email, and you’re good to go!

More Products

Zinus doesn’t just offer all-foam mattresses. They also have hybrid mattresses featuring a layer of individually wrapped iCoils.

In addition, they have a great line of award-winning products such as comfortable mattress toppers, adjustable bed frames, stylish platform beds, beautiful love seats, and elegant sofas.


Zinus gives you a chance to check out the mattress you just bought. Thus, the company gives you 100 days to test the product—that’s more than 3 months! If you are not satisfied, get in touch with Zinus to arrange for a return. Be sure though to keep your proof of purchase, and you also need to fill up an online form.

When you return the mattress, make sure that they are in good condition. That means no tears, no stains, and no weird odor. If the mattress comes with parts and accessories, you need to return them in good condition as well.

If the return is valid, Zinus will send you a prepaid return label and instructions for the return. Once the company receives your item, you will get a 100% full refund.

If you ordered a Zinus mattress from a Zinus retailer or partner, your return terms and conditions are defined by that specific retailer.

10-year Warranty

When you buy a Zinus Sleep Master Ultima Comfort Memory Foam Mattress from the company or an authorized retailer, a 10-year limited warranty is included in your company. You need to register your product on Zinus’ website and keep your receipt. The warranty covers defects and workmanship and materials.

How Does the Zinus Sleep Master Ultima Feel

On a standard comfort level of 1 to 10 (1 being the softest, 10 being the hardest), sleep testers rate the bed at around 6. It is supposedly cloud-like in its softness due to the two layers of memory foam. Unexpectedly, sleep testers find it to be a little over the medium-firm range. Heavier sleepers may feel as though they’re sinking into the mattress.

This means that the Zinus Sleep Master Ultima Mattress is softer and more comfortable to classic spring mattresses. When compared to other memory foam mattresses, it is a tad firmer due to the thick support foam.

The combined softness of the two layers of memory foam layers makes motion transfer less of a nuisance. That means you will barely feel your partner moving. Motion isolation is always a plus when it comes to a high-quality memory foam bed.

Heat retention is definitely adequate thanks to the infusion of natural plant oils. So you are assured of a cool, comfortable sleep even if the season is a little bit hot. There is no off-gassing thanks to the natural substances used in manufacturing the mattress.

Edge support, though, is found wanting—somewhat typical of all-foam beds. The edges of the Zinus Sleep Master Ultima sag to a large degree when you roll over the side.

Frequently Asked Questions

Stomach sleepers usually find memory foam mattresses too soft for their sleeping position. Their tummies sink into the soft foam, causing their spine to bend out of alignment.

The Zinus Sleep Master Ultima, however, can support stomach sleepers of average weight. Thanks to the composition of the BioFoam layers, the bed actually promotes even weight distribution. Heavier stomach sleepers though may find the mattress too soft.

Like all their all-foam product lines, the Zinus Sleep Master Ultima is a self-contained delivery system. Taking that cover off the BioFoam assembly may compromise the system.

Thus, it is highly recommended that you protect your bed with a separate removable mattress protector and topper.  Both protect the underlying mattress from dust, dirt, oil, and other debris. When it’s time for a cleaning, you’ll only wash the topper and the protector; the mattress itself remains free of dirt.

Rotating all-foam mattresses is a standard maintenance protocol. Doing so prolongs your mattress life and prevents uneven wear and tear.


But do not flip your Zinus Sleep Master Ultima mattress. The base layer is very dense, and you won’t feel very uncomfortable. In addition, the delicate memory foam layers may be damaged as they are not designed to support the base layer. Friction that results from the upside-down bed’s movement can rapidly fray the fabric and the foam.

Our Verdict

Harmonious interaction with your bed is important so you can enjoy a blissful, restful sleep. The Zinus Sleep Master Ultima Comfort Memory Foam mattress readily enhances that harmony. Its eco-friendly and safe BioFoam layers ensure that you sleep safely and comfortably. Infused natural elements in the foam give you that beautiful feeling of serenity.

With an affordable price, the mattress also has a harmonious relationship with your wallet. And that’s still not including the wonderful perks that Zinus gives you as their tokens of appreciation.

Sleep in harmony with yourself and with the Zinus Sleep Master Ultima Comfort Memory Foam mattress!

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