Zinus Sleep Master Ultima Comfort Memory Foam

9 Total Score
Unbiased independent Honest review of Zinus sleep master ultima comfort memory foam

One of the disadvantages of buying a mattress directly from the manufacturer is that you can not check the product physically. Meaning, it is difficult to identify if it will really meet your needs in terms of support and comfort. It is also hard for you to check the overall quality of the mattress. With that said, we created a comprehensive review. In this section, we will be featuring some essential criteria that we use to evaluate the mattress’ overall quality.

Pain Relief
Edge Support
Off Gassing
Back Sleeping
Side Sleeping
Stomach Sleeping
Warranty & Support
  • Is certified by the CertiPUR-US
  • Is compatible with all types of bed frames like day beds, platform beds, trundle beds, bunk beds, and box springs
  • Has minimal off-gassing
  • Sturdy
  • Less expensive as compared to other mattresses
  • Delivered directly to your doorstep
  • Since the topmost layer is composed of memory foam, it cannot be flipped
  • May take several days to achieve its full size
  • No trial period offered by the company
  • If you wish to return the product, it is not free (there are some charges that you need to pay)

Zinus Sleep Master Ultima Comfort Memory Foam is an affordable mattress that offers a great value. The manufacturer of Sleep Master mattress is Zinus, Inc. The company has been around for more than 25 years in the industry. Zinus is dedicated to providing affordable products that offer a high level of support and comfort. The Sleep Master mattress is an evidence of comapny’s dedication to providing customers with restful sleep.

Zinus Sleep Master ultima comfort is all made up of foam, specifically excellent-quality memory foam. The memory foam is known to relieve pain caused by pressure and provide a high-density base of support. The materials used in this product are certified by CertiPUR-US. Therefore, there are no strong chemicals that are utilized during the manufacturing process, making it safe for the people and the environment. Zinus utilizes Bio Foam natural plant oil as a substitute for petroleum. The natural plant oil keeps the mattress fresh for a long period of time.

Similar to other Zinus products, the Sleep Master ultima comfort is directly delivered from the company to the customer. This process has several advantages: You do not have to be stressed anymore with several sales tactics in store. The price is also much lower when you purchase products online. But, there are also some disadvantages. One of these is that you can not check the mattress quality before you purchase it; therefore, you cannot actually determine if it will really meet your needs in terms of support and comfort. Here is a quick video review of the product:

In order to help you, we prepared a comprehensive review. We will thoroughly analyze the features of the mattress so that you can have an idea what to expect when you purchase this product.

The Sleep Master Ultima Comfort is sold in Twin, Full/Double, Short Queen, Queen, and King Sizes. It is also marketed in a variety of thicknesses including  8”, 10”, 12”, and 13” Spring, as well as a 10” Hybrid. We review the 12-inch mattress here.

Mattress Layers

It is made up of 3 distinct layers of foam: 3-inch memory foam, 3-inch pressure-relieving comfort foam, and  6-inch high-density base support foam. All in all, when the three layers are combined, the total thickness of the mattress is 12 inches.

The following is a summary of the characteristics of each of the foam:

Topmost Layer

The topmost layer comprises 2-inch memory foam. This foam easily adjusts to the body’s contour and highly contributes to the softness of the mattress.

Second Layer

The second layer is composed of 3-inch pressure-relieving comfort foam. When the first layer conforms to the contour of your body, the pressure-relieving comfort foam begins to function by adjusting to your body weight and providing relief from pressure. This way, this foam is beneficial in lessening the buildup of pressure points and reducing body pain.

Bottom Layer

The last layer is made up of 6-inch high-density base support foam. This foam provides a base of support to the two layers above and is beneficial in maintaining the shape of the mattress. The bottom layer also contributes to the durability and overall comfort that the Sleep Master mattress provides.


The cover is made up of high-quality foam and fiber-quilted euro box-top cover. The cover also adds to the softness and also provides support. Moreover, the cover also contributes to the mattress’ breathability, thereby reducing heat retention. When it comes to aesthetics, we have nothing much to say about the appearance: Its color is white with a little detailing. As a whole, when it comes to looks, it’s not that attractive.

How firm is the mattress?

The firmness of the mattress is measured on a scale of one to 10, with 10 being the firmest and 1 the softest. As for the this product, we give it a rating of 5. It is neither too soft nor too firm, but it is in the middle. Since the firmness of the Zinus Sleep Master has an average rating, this means that several sleepers will be satisfied when it comes to firmness.

How comfortable is it?

When speaking of comfort, the Zinus Sleep Master is doing its job well. It absolutely gives more comfort than the traditional innerspring mattress. However, we have observed that the level of comfort that this mattress provides is the same as that of others brands of memory foam mattresses. It easily adjusts to the body’s contour, thereby creating a comfortable hug. It has also the capacity to absorb energy and minimize motion transfer; these are the two features that absolutely contribute to the overall comfort that the Sleep Master provides to sleepers.

Pain Relief and Support

In general, the level of pain relief and support is also average. We noticed that it provides moderate support for sleepers. We also observed that it relieves pain caused by pressure, but there are also other products in the market that are more efficient when it comes to pressure relief.

When talking about support, the memory foam comfortably hugs your body. However, a few consumers claimed that the foam has the tendency to indent too much, which made them feel that they are trapped. However, several consumers were satisfied with the degree of indentation since this gives them a comforting hug and they can feel the softness of the mattress.

Heat Retention

All foam mattresses are widely known to retain a high level of heat. This happens because body heat is usually absorbed by the foam, which in turn warms the mattress.

We found out that this mattress does not easily heat up, especially if you sleep on your side. It offers comfortable sleeping temperatures.

Off-Gassing – Does it have any smell?

One issue that is usually encountered with memory foam mattresses is off-gassing. During the manufacturing process of the foam, chemicals are usually used. These chemicals give off odor. For this product, we are pleased to inform you that we did not observe any instances of off-gassing.

The chemicals and materials that are used in the production of the foam are all certified by the CertiPUR-US, meaning that the company did not use any harsh chemicals. We believe that this is the primary reason why off-gassing is not evident in the Zinus Sleep Master.


You may have to exert extra effort when engaging in intimate activities as compared to using a traditional mattress. This is so since the layers of foam absorb lots of energy, and it does not have the capacity to easily bounce back, thus hindering movement when doing intimate acts.

Sleeping Position Ratings

There are different levels of support that are needed for each sleep position. Because of that, we conducted an assessment regarding the level of support that the Zinus Sleep Master mattress provides based on the three most common sleeping positions:

  • The back
  • The front
  • The side

Back Sleepers

In general, the weight of back sleepers is evenly distributed throughout the product. This is beneficial in the reduction of pain caused by pressure. Although nearly all back sleepers will be satisfied with this mattress.

Stomach Sleepers

The same as back sleepers, we believe that stomach sleepers with average weight will be satisfied because it also distributes the weight evenly. If the weight is evenly distributed throughout the mattress, there is a possibility that the pressure will not build up in the body, thereby reducing pain. However, similar to back sleepers, stomach sleepers may not enjoy this because the memory foam layer has the tendency to indent excessively, making them feel that they are trapped.

Side Sleepers

Among the sleeping positions mentioned, we believe that side sleepers will be the most discontented about. We noticed that the indentation level is too much when a person is sleeping on his or her side; therefore, this will lead to the buildup of pressure. When sleeping sideways, the weight of the body tends to focus on particular points; thus, a high level of indentation is not suitable for side sleepers.

Does it require foundation?

Zinus Sleep Master Ultima Comfort Memory Foam fits well with any bed foundation. We tested it on different bed frames such as solid surfaces, slatted frames, and box springs. We observed that whatever bed frame is used, the mattress was well supported. This makes it a quite flexible.

Although it fits well to any type of bed frame, we recommend using a solid bed frame, a slatted frame that has a narrow spacing (3 inches or below), or a durable wood or metal frame. Using these types of bed foundations will ensure that the mattress is supported, thereby allowing you to enjoy the benefits that the mattress provides.


The Sleep Master Ultima Comfort is shipped to your house. They effectively squeeze the mattress for shipping with vacuuming. The mattress is rolled and then put in a package which is shipped directly to you.

The package you receive is very easy to lift and move. It weighs between 30 and 135 pounds. The weight depends on the model and size of the mattress you ordered.

It comes along with special directions to open the box in 3 days. You should wait 2 days after opening the box so that mattress can return to its original shape.


Warranty, Guarantee and Trial Period

The company offers a limited warranty of 10 years. If you can encounter any damages caused by the manufacturing process within 10 years starting from the date you purchase it, you may contact the company, and they will replace or repair it.

The company does not provide specific guarantee guidelines. There is a possibility that you will be charged with some fees if you want to return it.

There is no specified trial period, but they provide a 30-day window for returns. However, as mentioned earlier, if you want to return the mattress, it is not free. You may be charged with some fees.


The Zinus Sleep Master Ultima Comfort Memory Foam mattress has average firmness. This is specially made to provide support and relieve pain caused by pressure for sleepers with average weight. In general, it provides enough comfort and support as what other competing mattress brands offer. We are also amazed by this mattress because it is certified by the CertiPUR-US. Off-gassing and motion transfer were also not observed. However, we were not satisfied with the cooling capacity that it offers. Another downside of this product is that the company does not offer a particular trial period or guarantee.

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