Zinus Sleep Master iCoil 13 Inch Spring Mattress – Complete Review

The Zinus Sleep Master iCoil 13 Inch Euro Top Spring Mattress has been designed and constructed for a deep night’s Zinus Sleep Master iCoil 13 Inch Spring Mattress - Complete Review rest. It is made available to the purchaser along with a BiFold Box Spring Set which replaces a traditional box spring. The mattress boasts hundreds of in individually encased coils which are coil springs and they provide a high degree of customized support. At the same time, these springs ensure that motion is isolated and that no motion transfer takes place between sleep partners. The mattress consists of a Quilted cover made out of the fiber, two layers of comfort foam which have pressure-relieving properties. A high-density foam layer follows these and finally by a thick layer of the individually pocketed coil springs. The manufacturer also provides a BiFold spring set along wit this mattress which eliminates the need for a Box Spring. The complete sleep system provides comfort and a high degree of support.

Materials and Construction

The comfort layers have been placed on top in this mattress because they would be closest to the body.  These are placed just above the 0.5-inch support foam layer which is a high-density foam as well as the 7.5-inch thick iCoil springs. Comfort foam is Polyurethane (PU) foam, which is manufactured by mixing polyurethane with chemicals.  The density level of comfort foam can always be controlled during the manufacturing process. Normally, higher density would provide better durability as well as performance.

These comfort layers in the mattress certain important functions which are crucial to this 13-inch mattress. They tend to cradle the body and are also instrumental in distributing the weight of the body evenly. This allows for greater pressure relief. The comfort layers also respond quickly to the body movements during sleep. This enhances the comfort level as the PU foam is compressed under the body and regains its shape quickly after the weight on it is removed. This allows for a higher level of comfort in each position. The comfort layers proved comfort, but at the same time, they are supportive enough to ensure that the body would not sink or sag too far deep into the mattress, which could result in unease. The body, as well as spine alignment, is facilitated due to these comfort layers. These layers encourage a very comfortable and pleasurable sleep experience conjunction with the bottom support foam and iCoil springs layers.

Polyurethane comfort foam layers are made out of high-density polyurethane foam as this is indeed the most common type of foam which is utilized to produce comfort layers in most mattresses. This type of foam is also Zinus Sleep Master iCoil 13 Inch Spring Mattress - Complete Review referred to as Polyfoam, PU, or Poly. In chemical terms, PU foam has a similar makeup as the memory foam. The only difference is that when pressure is applied to this type of foam, it compresses under pressure but tries to keep the body above it up. In contrast to this, memory foam would tend to soften a bit as either pressure or heat is applied to it. The PU foam is often employed in the comfort layers of many mattresses because it is possible to manufacture it as a soft foam, and it has very good comfort and pressure relief characteristics. This foam is also known to be quite resilient. More so even as compared to memory foam. It compresses and then quickly regains its shape, and this resilience is better than that of memory foam. The polyfoam layers that are used as comfort layers usually have foam with a density lower than 1.5 lbs./cubic feet.  As the density gets higher, the PU foam is employed as a support layer. The lower the density of the Polyurethane foam, the longer it takes for it to take shape back after weight on it has been moved.

The comfort layers polyfoam in this mattress are also instrumental in absorbing movements and are also quite bouncy.  The foam layers, therefore respond quickly to anybody movement on top of the mattress and also bounce back quickly to regain their shape. They ate quicker to respond as compared to memory foam. However, they are slower as compared to latex. On top of all of thee, layers are the knitted Jacquard cover with microfiber quilted fabric for additional softness. A high-density foam support layer follows the comfort layers of the mattress. Such support layers usually have higher density polyurethane foam in them. Underneath all the foam layers, is a 7.5-inch coil spring layer which contains hundreds of individually wrapped coil springs. These springs get compressed in such a way that only those springs are compressed which are directly under the weight of the body. The others do not. This way, motion is also isolated, and one sleep partner’s movement would not bother the other. The pocketed spring could also offer a high degree of support and offer a bounce-back which cancels out the sink produced by the upper foam layers. The lower layer supports the hips, shoulders, head, neck, and back and allow for a high degree of supportive comfort.

The complete set also includes a BiFold Box Spring which is in the shape of a metal bed frame.  This is used instead of the traditional box spring. As is evident from its name, this Box spring is foldable, and this allows for easier portability, transportation, handling, and storage. This BiFold Box spring is very easy to store even in tight places in the house as it can easily be folded to reduce its overall size. It is also very easy to transport it from one place to another within the house or outside. The very nature of the folding Box spring might wrongly suggest it could be fragile or unstable. However, this is very sturdy. It has been constructed out of heavy-gauge steel which possesses very high quality. It offers a high degree of support, and it is very durable at the same time. This Box Spring, which is supplied along with the 13-inch mattress, does not require any special set up. It is unpacked and needs to be only opened or unfolded to start using it.

The construction of the mattress is quite firm.  As the comfort foam layers used on it are only 4.5 inches, this much of comfort foam does not make the mattress plush or very soft. The cover of the mattress is quite soft, though, and it is also quite breathable. It wicks away sweat and moisture and keeps the mattress cool and dry on the top. However, as more of the mattress thickness is employed to provide support, the mattress is best described as a firm mattress. For those peephole firm mattresses, this is an idea mattress. However, those people who want to sleep very comfortable on a very plush and soft mattress need to purchase a soft and plush one. Some people might want to add a mattress topper on this mattress to make the top part as soft as possible. However, the firmness of this mattress construction is instrumental in relieving pressure points and back pain. It must be pointed out that the only breathable component in this mattress is the mattress cover and as such, the mattress is likely to get a little hot when used in simmer. It does not allow for airflow through it to create a cool microenvironment.

In the absence of any air circulation through the mattress, the user can always add a breathable mattes topper which along with the provided mattress cover can provide the necessary moisture wicking and temperature regulating properties on top of the mattress. The mattress contains box springs so the purchase would have to make sure that no organisms like allergens, dust mites, bacteria, allowed to reside in this mattress. This would ensure that the mattress would remain clean and hygienic. The coil springs provide excellent motion isolation and resist motion transfer between sleep partners. This is very helpful to those couples who have at least one partner who tosses and turns or is restless at night. The mattress would ensure hat the other partner would not be disturbed.

Comfort & Ergonomics

The Comfort level of this mattress is best described as a firm. However, this does not mean that it is not comfortable. Zinus Sleep Master iCoil 13 Inch Spring Mattress - Complete Review It is comfortable for people who prefer a firm feel. The breathable fiber cover of this mattress produces an airflow through the system. The airflow wicks away body sweat and moisture away from the mattress and keeps the top part of the mattress cool and dry. It is not highly breathable as the two top comfort layers, as well as the support layer of foam, are not highly breathable. The overall comfort related to breathability and coolness can be increased by adding a highly breathable mattress topper which would provide a higher level of coolness and dryness on top of the mattress.

The comfort layers of the mattress enable comfort as a result of their ability to bounce back when they are pressed under the body. The upper layers have a higher bounce back capability or resilience as compared to the higher density support layer of foam.  This way, they provide the necessary resilience as the bodyweight is exerted on them. The resilience or bounce back and the ability to regain shape rather quickly as compared to the support foam enables them to be quite comfortable. They relieve pressure points and prevent backaches and pains from occurring.

The mattress also provides comfort by not allowing any transfer of motion from one portion of the mattress to another. Not just the comfort layers but the coil springs are also involved in this process. The comfort foam layers have motion isolation capabilities, which are further enhanced by the coil springs. These coils depress under the weight of the body; however, only those individually encased coil springs are compressed which lie directly under the body. As soon as the body or body part is moved away, the individual coil springs spring back into position. This way, not only the original shape of the mattress is regained, but the motion does not transfer from this part of the mattress to other parts. This means that if one of the sleep partners is restless or gets up from the mattress, the other partner would continue to sleep comfortably as the motion would stay isolated in the area of the mattress where the first sleep partner was resting. This provides comfort and peace of mind to both sleep partners.

An enhanced comfort level is also achieved due to the non-toxic nature of the foams used in this mattress. All the foams used in it are CertiPUR-US certified, and this means that they do not contain any harmful chemicals like flame retardants, formaldehyde, PBDEs, phthalates, etc. This certification also ensures good room air quality as the emission levels of Volatile Organic Compounds (VOCs) are well under control and within acceptable limits. Moreover, the CertiPUR-US certification assures both the content and the performance of the foams used in this Zinus Sleep Master iCoil 13 Inch Spring Mattress - Complete Review mattress. The absence of toxic materials, as well as clean air in the room, are a great source of comfort as well.

The support foam layer, as well as the pocketed coil spring layer at the bottom of the mattress, ensure that the mattress has got the right amount of support to prevent the body from sinking into the mattress. The bounce-back provided by both the support foam as well as the pocket springs is a great source of comfort as it holds up the shoulders, neck, head, and hips in position and does not let these parts sink downwards.  The combined action of the breathable cover and all the foam layers in conjunction with the pocketed coil springs bring ultimate body-conforming comfort, which is due to the ergonomics generated by this sleep system. As mentioned above, this is not a plush mattress, and anyone who is looking for a very soft mattress would be better off choosing a softer mattress from this manufacturer. However, it serves as a very comfortable and supportive mattress for all those people who prefer a firm mattress.

Durability and Warranty

The level of durability of any mattress is dependent upon the quality of materials used to manufacture it. The mattress consists of high-quality foams as their CertiPUR-US certification assures this. This certification assures that the foams are good to use the bot in terms of content as well as performance. Both these qualities are related to durability. The absence of toxic chemicals in this mattress ensures that they would last for a long time and not be harmful to human health. The fact that they do not contain harmful chemicals like formaldehyde, phthalates, PBDEs, and flame retardants suggest that they have been processed properly and that such harmful chemicals have not been used in their processing. The limiting of the volatile Organic Compounds (VOCs) to acceptable limits and their emissions being under control also brings an assurance related to the quality of these foams. High-quality Zinus Sleep Master iCoil 13 Inch Spring Mattress - Complete Review foams used in this mattress guarantee that the mattress would be durable and last for a very long time.

The support foam layer, as well as the coils, pocketed springs provide a high level of support to the upper layers of the mattress as well as to the body. The support base of any mattress determines its durability. If it is robust and strong, the mattress will last for a very long time and of the support base is not sturdy enough, the mattress would not be able to serve for long.  This mattress has got a 7.5-inch layer of soils which are independently encased, and these are made out of robust steel.  The presence of so much steel in the mattress ensures its durability as pocketed coil springs last for very long and retain their functionality as well.  The sturdy coil springs at the bottom of the mattress not only provide support but also ensure that the mattress would last for a very long time. As for the support foam layer, it is a high-density foam layer, and high-density foam is also very durable and robust as well.  Thus, the entire support system in the mattress is highly durable.

The way the mattress is used and maintained has a lot to do with its durability as well. The mattress needs to be properly handled, especially during tripartition, and it must be ensured that it does not come in contact with any sharp objects which can cause tear or cuts. Moreover, the mattress needs to be protected from sources of heat and fire, which can cause burns on the mattress. The mattress is unpacked after its arrival and needs to be off-gassed for a couple of days. It should be left in an airy room preferably with the fan on and without any bedding, etc. on it. This would allow it to regain its shape, which changes after it is shipped in a compressed manner. The mattress always contains some processing air which needs to be pushed out as it off-gases for a few days. Once, it is set up and being used, electric blankets or heating pads need to be avoided as they would affect the body-conforming properties of the comfort foam layers.

The maintenance and the way the mattress is cleaned also play an important part in determining its level of durability. The mattress can only be spot cleaned. No bleach or chemical should be used. In case, it gets a large spill which soaks the mattress; it must be dried with a piece of cloth which is subjected to pressure to ooze out the liquid from within the mattress. Afterward, it can be cleaned with the help of water-based products. Regular cleaning of mattress would also ensure that no dust mites and allergens would be allowed to creep into the soils layer of the Zinus Sleep Master iCoil 13 Inch Spring Mattress - Complete Review mattress.

The mattress carries a 10-year limited warranty. The warranty covers defects against materials and workmanship. Cuts, burns, damage due to spillage of liquids, etc. are not covered by the limited warranty. The BiFold Box spring carries a 5-year limited warranty, and this warranty also covers defects due to materials and workmanship. Any damage suffered during handling and transportation, etc. For both the mattress and the BiFold Box Spring is not covered by the manufacturer’s warranties.


The mattress has got a total height of 13-inches, which includes the part added due to the breathable cover as well. The bedding would also raise the height a little more. This height needs to be added to the bed frame base or foundation base height to get the total height of the sleep system. In case, it appears too much, a low bed frame or foundation could be employed to get to the desired height. The mattress is available o only three sizes, and these are the Full, Queen and King sizes. The Full mattress is 75 x 54 x 27 inches and weighs 130 lbs. The Queen mattress has got product dimensions of 60 x 80 x 13 inches, and the weight is 105.6 lbs. The King size has got product dimensions of 76 x 80 x 13 inches.


The Full size of this mattress is being sold at $449.93 while the queen size is available for 549.99. The King size can be purchased for $700.00. The price of the largest of this mattress is well under $1,000. A such, this mattress is considered moderately priced. The mattress offers a firm feel to those people who prefer it and also offers body-conforming comfort. The level of support is quite high and to top it all, it comes along with a BiFold Box Spring which replaces the traditional box spring.

Who is it Ideal for?

The Zinus Sleep Master iCoil 13 Inch Euro Top, Spring Mattress with BiFold Box Spring Set, is ideal for those people who prefer to sleep on a firm surface. It is not for those who want a very plush and soft mattress. The mattress offers pressure relief and as such, supports those people who suffer from back pain and aches, etc. It provides body-conforming comfort, and all those people who enjoy a comfortable sleep on a body-conforming, firm, and supportive mattress would like it.


  • The mattress consists of a breathable cover.
  • The mattress has got two layers of comfort foam to enhance the comfort level.
  • The mattress is ideal for people who prefer a firm feel.
  • The foams used in the mattress are CertiPUR-US certified.
  • The mattress contains a 7.5-inch layer of soils which are independently encased coil springs for a high level of support.
  • The mattress comes with a BiFold Box Spring.
  • The mattress carries a 10-year limited warranty while the BiFold Box Spring has got a 5-year limited warranty.


  • People who prefer softer mattresses do not like its firm feel.
  • Some people find it smelly in the beginning.


This mattress is quite reasonably priced for a 13-inch Foam plus Coil spring mattress. The mattress has got affirm feel and pleases those who prefer firm mattresses. Those who prefer softer ones can look for other softer mattresses from the manufacturer. For al those people who want body-conforming comfort, a high degree of support and a firm feel, it is a good mattress. The foams used in it are also CertiPUR-US certified, so it has got high-quality materials.

Zinus Sleep Master iCoil 13 Inch Spring Mattress – Summary
Price: $$$
Firmness Firm
Warranty: Ten years of the limited warranty for the mattress, 5-year limited warranty for the BiFold Box spring
Type: Hybrid mattress with foam and coil springs
Ideal for: People who prefer a firm mattress with body-conforming comfort and support
Category: Hybrid Mattress (Foam plus Coil springs)
Quality of Materials: CertiPUR-US certified High-Quality Foams

Heavy-gauge steel used in BiFold Box Spring

Differentiators Firmness, Body-Conforming, supportive Hybrid Foam plus Coil spring mattress
Comparable Mattresses: Olee Sleep 13-inch Galaxy Hybrid Gel Infused Memory Foam and Pocket Spring Mattress

Zinus Ultima Comfort 12 Inch Euro Box Top Spring Mattress

Rating: 4.2/5.0


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