Date : 2021-03-17 10:36:14

Is the PU foam mattress good or bad for a comfortable sleep?

PU foam as a material is soft and helps comfort and keep you cool, but the balance of pros and cons lies in a debate. However, before delving deeper into the benefits or disadvantages of PU foam, it is essential to understand the benefit and science behind sleep. Your mattress can be good or bad for you, depending upon the sleep quality it offers you. And the sleep-quality you get from your mattress depends on your body's compatibility with the said mattress.

Sleep quality is our body's ability to sleep adequately and go through the necessary sleep cycles and phases. Moreover, sleep-quality also relies on your sleep environment (pillows, mattress, air ventilation, lighting), among others. Your sleep-quality is also crucial because of how your body recovers and relaxes in different sleep phases. While your conscious mind is dormant, your subconscious mind activates and carries out other functions. So, while your body relaxes and recovers, it also needs an essential factor that helps it do all those functions effectively- a perfect sleep environment.

A cool or slightly warm temperature, as per climate and preference, a soft/firm pillow, and a compatible mattress together aligning your body posture. These elements help you sleep and wake up feeling fresh instead of awkward pains, headaches, and potential chronic pains. Additionally, sleep-quality also depends on how your body sleeps in different orientations or aligns posture.

Importance of a mattress:
Sleep-quality and everything about how you sleep rely on your mattress experience. From the time you take to switch to deep sleep, duration of your sleep, comfort, and overall support to waking up fresh, rely on your mattress. Because of these reasons, you need to address mattress quality just as you would choose any other item in your personal care.
A high-quality mattress ensures that you feel at ease when going to sleep, and your body reacts to the comfort with a sense of calm blanketing it. You feel the softness and overall support balanced as per your preference and requirement. Your mattress serves as the main item in your bedroom because of these elements make your home something to look forward to for relaxation.
Scientifically speaking, you need to be comfortable in a calm and adequately ventilated environment, making the mattress the core of your bedroom. Moreover, in cases of inability to sleep, sleep disorders, or less sleep, it is even more critical to address your mattress simultaneously changing your lifestyle. Sleeping on a low-quality or incompatible mattress leads to pains, trouble sleeping, and other issues that cause poor sleep quality.

About PU Foam:
PU foam is one of the most affordable, widely available, and softer materials we can find in mattresses. And the affordability of PU foam as a material doesn't always mean your mattress would be inexpensive. But the price depends on quality, density, manufacturing, and thickness. High-end mattresses or ultra-luxury and even orthopedic mattresses may use PU Foam as a layer in different configurations. PU Foam works to give a cooler yet comfortable sleeping experience.

Used in traditional mattresses as a comfort layer, PU Foam has come far in its uses and serves an important role today. PU foam may not be directly long-lasting, but its density and chemical properties ensure the mattress's longevity. PU Foam has a conception of being poor-quality, and there's not much truth behind this. The quality of PU Foam depends on its chemical manufacturing process, density, and overall structure. It has to be durable, comfortable, supportive, and good-quality PU Foam that can cover all three bases.

PU Foam as a material has wider pores and more of an open-cell structure which is both an advantage and a disadvantage. It enhances and regulates temperature distribution, but at the same time, it can be a negative factor for the mattress. Let's get into detailed analysis for further clarification:

Advantages of PU Foam:
PU Foam as a material is versatile in its usage, density, and other elements, making it one of the best foam types. By changing the manufacturing process additives, we get memory foam, and further additions give other variants of foam mattresses. So, PU Foam can also be looked at as a starter or primary foam material that has excellent usage:

  1. Abrasion Resistance: PU foam, as an abrasion-resistant material, is resistant to wear and tear. This makes it an excellent option for support and sandwiching between different layers of hybrid mattresses. When the foam layers rub together because of movement, thin layers of PU Foam in between prevent them from wear and tear against each other.
    The abrasion-resistant property makes PU foam a perfect sandwich layer between different foam layers and keeps the mattress working optimally for a long time. In ultra-luxury or hospitality mattresses, PU Foam acts as an abrasion-resistant material between innerspring and other foam layers and even helps with heat regulation. Moreover, a thick layer of PU Foam on top of an innerspring system also helps increase the durability of the innerspring coils and the layer above following the same principle. Hard PU foam is also used in the edge protection casing of luxury mattresses, making them durable, rigid, and give better aesthetics.
  2. Temperature regulation: PU foam can help with temperature regulation with the proper density and cell size. While it stays hotter in general, you can rely on PU Foam for a warm sleeping experience, and higher density also adds to this factor. Despite the cell size, PU foam is not as good at air regulation and stores moisture and body heat. So, PU foam is only good at temperature regulation and insulation depending upon its density and manufacturing.
  3. Comfort enhancement: Although PU Foam's density as a mattress is variable, it is soft in nature. Because of its softness, it makes for an excellent comfort layer in most mattresses. You can find PU Foam layers (both thick and thin) as a means to comfort and reduce the blow from more rigid layers in mattresses. In orthopedic mattresses or even high-end mattresses, PU Foam and memory foam mattresses are excellent choices for quilting and comfort layers. Depending upon density variation, it is possible to configure PU foam for different purposes and degrees of softness in your mattress. PU foam is excellent at taking away pressure from your body's variable regions, joints and helps with superficial pain relief. Although you need a harder/firmer mattress or foam layers for chronic pain, foam materials like PU foam are suitable for comfort and immediate pain relief. So, you can sleep on either side and sleep a cooler yet pain-free experience.
  4. Inexpensive: PU foam is an affordable material, and the same applies to PU foam as a mattress layer. It is easy to manufacture, but the density variance could give it a higher cost factor. Moreover, since the last century, in most mattresses, PU foam has been in use, and it's widely available as a result. So, if you're looking for an affordable mattress, it would likely have multiple layers of PU foam.
    But this doesn't mean that PU Foam as a material is inexpensive and not worth buying because it's "cheap" or vice versa. Good-quality sleep-grade PU foam exists, and it can be a little expensive, depending upon the density and overall manufacturing. The pricing comes down to the manufacturer, thickness, density, and overall quality of your PU Foam mattress or layers of the mattress. The majority of the manufacturers use low-quality and standard PU foam which gives it a bad name, but the quality and price can be subjective, as mentioned.
  5. Density and Variety: PU foam is usually soft, but its density is variable because it is a foam first. High-density PU foam also has larger pores but may have a firmer experience, and smaller pores are also configurable. However, that would lead to a material similar to memory foam and in a grey area between PU foam and memory foam. Changing the density can make PU foam hard or soft, and mattress configuration changed accordingly. While more rigid PU foam is used to make edge protection or form support layers in mattresses, soft PU foam is for comfort. A rigid or firmer PU foam layer is best designed for support layer in some mattresses.
  6. Health Benefits: The softness, temperature regulation, and other PU foam features as a material help with sleep benefits in mattresses. Depending upon the density, PU foam can help increase your sleep quality. PU foam quality and density influence its ability to be soft or hard enough to comfort or support your body. From offering a slightly cooler experience, you can rely on PU foam to be suitable for people who sleep "hot." More on health benefits later.
  7. Mattress usability: PU foam is usable in several ways in your luxury mattress. It can be used as a layer to protect different layers from frictional wear and tear. Sometimes rigid PU foam can be used in the core of your mattress to extend the mattress's height or make the mattress firmer or more supportive. These factors, again, depend on the density of the material. Moreover, PU foam is also used in quilting and support layers depending upon the density configuration, making it a material to use in different layers.
  8. Lightweight: PU foam is lightweight and easy to install in your home. The same feature also helps make PU foam the preferred choice for hybrid mattresses relying on its softness. Despite a higher density, PU foam is lightweight as it has larger pores which reduce the weight and allow for a breezier sleeping environment. The lightweight is both beneficial and disadvantageous to PU foam because it increases its fragility.

Disadvantages of PU foam:
While good-quality PU foam has its advantages, PU foam as a material also has several disadvantages, making it a poor decision for most people. If you have PU foam centric mattress with a low-density issue or other factors, here is what to watch out for:

  1. Poor support: Most PU foam available in the market aims for a more comfortable experience than support. A purely PU foam-based mattress wouldn't offer support despite being high-density. Yes, it can be used in some mattresses' core layer, but it is very high-density to make it viable for support and needs unique manufacturing. Because of its softer nature, PU foam is not suitable for body support, and you can find better choices in high-density memory or latex foam.
    If you're suffering from body ache and backache, they need more support than comfort. PU foam is good at superficial comfort (as a layer in your mattress helping cushion the blow). However, it is not a good option for comfort or hugging your body the way memory foam does. PU foam, in general, as a component of your mattress, isn't good for support as a standalone layer.
  2. Insulation: The temperature regulation and insulation are variable in PU foam mattresses, and it depends on the density of the material. However, sleeping on PU foam mattresses or comfort layers would be a slightly warmer experience. Unlike memory foam which hugs your body and warms you, PU foam doesn't hug your body but provides a warmer temperature nonetheless. This can make the heat insulation factor contribute to discomfort, especially in people who prefer the opposite environment. However, PU foam is also used as a quilting material, as a high-density layer to promote temperature insulation. Poor ventilation despite larger pores is another reason why PU foam can retain body heat, becoming a poor choice for people that want to sleep cool. Sometimes low-density or large pore size in PU foam can also help regulate air, and it goes against the material's nature. Still, it is a dynamic configuration needing more science and understanding to create and install.
  3. Odors: PU foam is one of the most basic foam materials you can find in the market, and the price tag is partly because of some manufacturers offering the poor quality or low-density options. However, irrespective of density, PU foam can be a wrong choice for a clean sleeping environment, as with poor ventilation and larger pores, you get an excessive odor. It traps sweat, body moisture and can be a place suitable for germs to dwell, often needing vacuuming or extensive maintenance and treatment. Moreover, PU foam also traps allergens, dust, and other particles that add to its off-gassing and odors list. Another reason for the odors and off-gassing can be the manufacturing process which aims to make PU foam denser or hypoallergenic but achieves the contrary.
  4. Uncomfortable: PU foam mattresses can be uncomfortable because of the material properties of the foam. Although it is soft in nature and can enhance comfort in different configurations and mattress types, it is not a good material as it is. A standalone PU foam mattress would be uncomfortable both because of body heat retention and overall uneven plushness or comfort. Unlike memory foam, PU foam doesn't allow your body to sink in and is a medium-soft material. As a result, you get a material that is as unforgiving as it is uneven. Some PU foam mattresses may use an egg-create PU foam layer for support, but it acts as one of the worst options to use in a mattress. You find yourself unable to sleep, and the uneven support and comfort only add to the list of woes from a PU foam mattress. Sleeping in different positions would also be inconsistent with how PU foam offers comfort, and it can be a different experience each time. Your body weight would be prone to shifting, and you might find yourself tossing and turning more.
  5. Short-lived: One of the worst things PU foam is known about is its short-life. Although it is abrasion resistant and may be used in mattress layers, you can find it breaking up or tearing up. The short-life is primarily because of its quality and density, and high-density PU foam is used in mattress layers for support and friction reduction. So, as a material, PU foam isn't the best option if you're looking for a long-lasting mattress. It can depress and sink more, as well as tear away. Most manufacturers sell poor-quality PU foam which tears away after offering short-term comfort, and you're stuck with an unforgiving and uncomfortable mattress. Even if you manage to use a PU foam mattress for the long-term, it brings along a slew of hygiene and sleeping issues. An aged PU foam mattress with a low-density variant can bring posture issues and other health issues in the long run.
  6. Posture-issues: Because PU foam is softer and allows your body to depress it slightly than sink properly, you experience excessive posture issues. Your body sinks beyond what is comfortable, and the mattress still offers more sinking without offering any support. In hybrid mattresses, PU foam is mainly used for allowing the body to sink slightly with some support to back up and align your posture. However, as a standalone material or a standalone PU foam, it doesn't offer any support and can become a factor for various body pains. If you have higher body mass, it can sink and then lead to posture and sleep issues in addition to a hot sleeping experience.
  7. High-maintenance: PU foam is usually medium-soft and offers a comforting sleeping experience, but it needs a lot of care. As mentioned above, PU foam is prone to wear and tear over time. It can break or tear apart and might need a regular vacuum, ventilation, and sun exposure. However, these factors depend on the material quality, and poor-quality PU foam has these issues and more. Whereas high-quality PU foam would be less prone to wear and tear and be more abrasion-resistant, it would still be high-maintenance. You would need to clean and vacuum the mattress and even wipe it from time to time. Because PU foam gets body impressions quickly, sitting on one side would lead to a semi-permanent (depending upon density and quality) impression. You would need to use the other side to allow time for the impression to restore.
  8. Allergies and sanitization: Larger pore size leads to PU foam piling up harmful environmental elements like dust, pollen, and other elements that can get trapped easily. Because PU foam doesn't allow easy air ventilation, these harmful elements enter and can settle in the mattress or PU foam layer exposed on top. As a result, you might get a layer of dust that permeates through the layer or entire mattress to layers beneath or settle on the bed frame. This piling up of allergens, dust, and other issues can also attract pests that attack the foam, creating additional health risks. It is challenging to clean and sanitize the mattress because of these factors accumulating and making the mattress hard to clean and maintain.

Why is it a Good Option to use a PU Foam Mattress?
After understanding the material properties of PU foam, it is crucial to understand the role it plays in mattresses. PU foam as a layer and as a standalone mattress are different things and impact our health for the better or worse accordingly. Here are the benefits of using PU foam in mattresses on your health:

  1. Pain-relief: High-density PU foam is an excellent option to use in the comfort layer as it allows your body to sink reasonably and evenly, but the experience is different from memory foam. Where memory foam would trap heat and hug your body, PU foam would trap less heat and sink without hugging your body. As a medium-soft material, PU foam can help relieve pain at the end of the day from muscles paining because of strain or inflammation. It isn't the most comfortable mattress layer but helps with pain-relief to some extent, especially in ortho foam mattresses. Since ortho mattresses can be firm or ultra-firm, PU foam can be an excellent option to sink without excessive overheating and keep costs down.
  2. Sleep temperature: High-density PU foam traps heat efficiently and can be an excellent option to use for a warmer sleeping experience. It doesn't trap as much heat as memory foam because of the larger pore size but helps with decent warmth. Moreover, PU foam can also play the role of a coolant or air regulating layer with the proper construction and density. Using PU foam in quilting can help increase airflow compared to using memory foam in the quilting. This helps achieve a higher level of airflow and better temperature regulation, although it isn't typical for PU foam to behave this way.
  3. Sleeping orientation: Since PU foam is a softer material, it allows your body to sleep in different positions and offers movement freedom. So, sleeping on the side or back wouldn't be an issue. However, it is best to use high-density PU foam for some degree of support to go along with its comfort. Usually, PU foam is only used in the quilting or comfort layer with a firm support layer to enable a healthy balance of comfort and support. PU foam supports sleeping in the side and back orientations without putting any pressure on your spine. High-density PU foam can also help with spinal alignment as long as it is paired with the proper support.
  4. Support: Low density or poor-quality PU foam isn't an excellent option to look for support. However, extra-firm or very high-density is also used in some mattresses for orthopedic use. This helps keep the mattress in the affordable range, and using PU foam in the core doesn't offer any cons. It is essential to understand that PU foam is only suitable for support as long as we use it in the core or support layer in a very high-density configuration. Harder PU foam is used for edge support also, and this helps protect your mattress and make it easier to get up. The rugged casing keeps the different layers in proper alignment, making rigid PU foam one of the best options to use for support. In dual-comfort mattresses, you can also find high-density PU foam in the core, and the overall support relies on support rather than comfort. As long as the core is supportive, dual-comfort mattresses can also use PU foam in their support or comfort layers.
  5. Dual-usability: As mentioned above, PU foam can be used in different forms, and this makes PU foam one of the best materials to use in different ways. High-density rigid foam can be used in edge casing, core support, and support layers. High-density softer foam can be used in the comfort layer or quilting to enhance the sleeping experience, comfort, and temperature. Moreover, PU foam mattresses are both sides usable, as one side may develop impressions over time. So, you can flip the mattress over while the other side recovers its form. Using PU foam in innerspring mattresses also enhances the mattress durability while also enhancing comfort, keeping costs down simultaneously.

King Koil PU foam mattress:
The YouBed is a dual-comfort mattress that relies on different PU foam density variations to offer a comfortable sleeping experience. The core comprises of 50D ultra-firm HR foam, which offers support to either side of the softer comfort and support layers. The YouBed uses soft PU foam in both comfort and support layers enveloping the mattress and offering a medium-soft experience. PU foam can sag, and the YouBed combats this con with a dual-use mattress you can flip if it happens. The PU foam-centric YouBed is best suited for bachelors with an average body weight as an affordable mattress. The looks also take after a trendier denim look and have sturdy handles to flip the mattress, adding to the aesthetics. This mattress also offers motion isolation to some extent because of the extra-firm core.

PU foam has plenty of downsides and upsides. As a standalone mattress, PU foam isn't good for your health, but it changes if you configure it with the proper support. Using PU foam in different density variations in hybrid or ortho mattresses can help keep the costs down and provide comfort. Whereas using the same variant as a standalone form in a mattress wouldn't be a good idea. PU foam has taken a bad name because of its material properties in poor-quality options and manufacturers. However, high-quality PU foam has its own pros and cons.

It is always a good idea to use our SleepID algorithm to determine a mattress that suits your body. That way, you can't go wrong with your PU foam mattress choice and explore the best options in your budget. YouBed and ultra-luxury mattresses, dual-comfort mattresses in our range, use high-quality PU foam to rely on its benefits. With years of research and development efforts, PU foam in KingKoil luxury mattresses is in the best thickness and density to enhance your sleep-quality and a comforting experience.


  1. My old mattress was PU foam and led to body pains. What is the best choice for an upgrade?
    Inferior or low-quality PU foam with a lower density factor can lead to body pains and other health risks. It is especially true for aging PU foam mattresses, as it sinks permanently, and irrespective of thickness, you end up with a bad sleeping experience. The lack of support that your body relies on and the uneven support from the mattress and bed frame leads to body aches. Moreover, old PU foam mattresses with a low-density form factor lead to lower back issues as it needs exceptional support especially when sitting or getting up. The best choice for an upgrade would be a mattress that provides lower back support and eliminates the health-risks. A medium-firm ortho foam mattress, or a latex foam mattress, and variants of innerspring mattresses would be best suited for you. Additionally, you can try out our SleepID test to see the mattress options that suit your body frame and requirements better.
  2. Does memory foam offer the same experience as PU foam?
    No, memory foam and PU foam are entirely different in terms of a comforting sleeping experience. Adding chemicals to PU foam and a unique manufacturing process yields memory foam, but the sleeping experience is not so similar. Where you would experience a soft, body contouring, and even supportive experience in memory foam, it wouldn't be the case with PU foam. PU foam does offer a slightly sinking experience but doesn't contour or hug your body. Where memory foam would be a softer experience, PU foam would be medium-soft or soft without the support or body-hugging. Moreover, PU foam doesn't sink as much as memory foam with the same density variant. Memory foam mattresses would be warm and trap heat, whereas PU foam would trap less heat and not as warm as memory foam. Instead, low-density PU foam is used in quilting for air and temperature regulation.
  3. Will opting for a PU foam mattress drive the cost down?
    In some cases, yes, opting for a PU foam mattress can drive the cost down. In most cases, PU foam is present in hybrid foam mattresses as a layer between the different support and comfort layers. The prices for these mattresses can be on high. However, in mattresses where memory foam or latex foam is present as the comfort layer, opting for PU foam can lower the cost. In the end, you should always choose a mattress that is good as a long-term investment and aim for the best materials. Materials like memory foam, latex foam, or rebonded foam have their own uses, and PU foam is different.
  4. Does a PU foam mattress offer a cooler or warmer sleeping experience?
    - PU foam, by default, offers a warmer sleeping experience. It traps heat and body temperature but not as efficiently as memory foam. This feature makes PU foam a suitable replacement for memory foam when the mattress already has a warmer construction. Moreover, thin layers of PU foam help regulate temperature and air in hybrid mattresses, offering a slightly cooler sleeping experience. As a standalone mattress or a thick comfort layer, PU foam offers a slightly warm sleeping experience but not enough to make you overheat and sweat.
  5. Is a PU foam mattress suitable for support?
    High-density PU foam mattresses can be used in some mattresses' support layers, offering some support and keeping the mattress in shape. However, PU foam as a soft or low-density variant isn't good for support. If you're choosing a mattress with a PU foam comfort layer and little support, it wouldn't be good for your health and posture. On the other hand, extra-firm PU foam is excellent for support as an edge protection mechanism and a core layer. It is abrasion-resistant, which makes these configurations long-lasting and rigid. Dual-comfort mattresses rely on core support, and ultra-firm PU foam can provide the necessary support.
  6. Does a PU foam mattress give an off-gassing problem?
    - Yes, a PU foam mattress can have an off-gassing problem, but it depends on the manufacturing process's chemical additives. If one tries to make it hypoallergenic or firm without increasing density, a new PU foam mattress can have an off-gassing issue. Whereas in-house manufactured high-quality PU foam with the proper density doesn't have any off-gassing issue. The off-gassing issue only exists in poor manufacturing practices or processes that aim to enhance the material properties unnaturally. Thin layers of PU foam or comfort layer with high-quality configuration do not lead to off-gassing.
  7. Is PU foam the right choice for adults?
    As a standalone mattress, PU foam isn't a suitable or good mattress for anyone. Since we're talking about adults (above 30), PU foam isn't a good option. The YouBed is a good option for bachelors with a healthy BMI as it offers support and comfort at an affordable price. However, for adults over 30, issues like lower back pain or general muscle aging factors do not allow a soft and non-supportive variant of PU foam mattress to qualify as a good mattress. The best option for adults over 30 would be to choose a comfortable yet supportive memory foam, innerspring, or latex foam mattress. Our SleepID algorithm can help churn out the best mattress options for your age and body frame.
  8. Will PU foam break if I keep it in the sun too long?
    PU foam is high-maintenance, and it can wear and tear depending upon quality and mattress construction. Heat and humidity can accelerate this process of wear and tear, and the sunlight is another accelerant. Moreover, most PU foam mattresses available in the market opt for poor-quality and low-density variants of the material. Low-quality PU foam would break and tear easily, irrespective of sunlight exposure, and chemical additives in the manufacturing process are also a contributing factor. Coloration is another issue that leads to the fast wear and tear of a PU foam mattress. The turmeric coloration can accelerate with excessive sunlight to white and break down the mattress easily.
  9. How long does a PU foam mattress last?
    PU foam isn't the most durable of foam material option. Your mattress could be unusable within a year if it's poorly treated or is low-quality. However, good quality PU foam is slightly more durable and bound to last 2-5 years. PU foam is also prone to sagging, allergens, and other external elements. The presence of these elements accelerates sagging, discoloration, and other issues with it. Bodyweight could be another issue that leads to permanent impressions and accelerates a PU foam mattress's wear and tear. The best use of PU foam is in quilting as a replacement for memory foam, and the proper density and quality lasts as long as the mattress (if it is protected). That is why ultra-luxury mattresses use PU foam in between layers and quilting in some construction options with high-density materials.