What Is the Best Foam for Seat Cushions?

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What Is the Best Foam for Seat Cushions?

Foam can be a confusing topic. There are many different types and each one has its own benefits. It is important to know what you want before buying foam for your seat cushions or other products. The difference between natural latex foam, memory foam, and gel foam is important to understand, as we will cover the pros and cons of each and compare everything you need.

As a general rule, the best foam for seat cushions is latex foam with a high-density base of 80 to 96 kg/m3, and a soft top layer of 64 to 70 kg/m3. When choosing the foam, you must also consider the intended use of the seat cushions and the required resilience.

With decades of experience researching and designing seat cushions, I can help you discern the best foam for your seat cushion which is most comfortable for you.

Latex Foam Seat Cushion

Latex foam used in seat cushions

Latex has become an increasingly popular choice among luxury seat cushion manufacturers in recent years thanks largely to its capacity to conform as well as respond quickly under pressure without losing shape like some competitor memory or polyurethane foams do while still maintaining its comfort levels for hours after even heavy use.

There are many different gauges of latex density and it can affect the performance, durability, temperature regulation, and cost of your seat cushion. We’ll take a look at these differences in our guide to help you make an informed decision for your purchase!

Latex Foam Comes in Varying Densities

Density is simply the weight per unit of volume. For foam materials like latex used in mattresses, density is expressed in kilograms per cubic meter (kg/m3).  In the table below, we examine some common ranges of density for latex foam and compare these ranges to those of memory foam and polyurethane.

an info-graphic that contains comparisons of the firmness of different foams used in wedges

The density of natural latex foam is typically higher than that of other types. Each type has different properties, so the best density for each material will be very different – it can’t really be compared by looking at a chart because one kind might not even show up! That’s why you need to know exactly what materials are used in order to figure out which one would work the best with your seat cushion and how firm or soft you want it to feel.

We compared a wide range of seating materials and products and found natural latex to be the best choice. Here’s why:

  • A natural latex seat cushion allows your muscles and ligaments to relax and recover while improving your blood circulation as a result of its pressure distribution.  
  • A 100% natural latex seat, as opposed to memory foam seats, is made of natural materials and contains no chemicals. 
  • Natural latex can align your spine and alleviate pressure points.
  • In addition to preventing you from sinking into natural latex seats too deeply, its unique cushioning will rebound when you apply your body weight. 
  • In sustainable latex farming, the sap is harvested from healthy Hevea Brasiliensis trees, while newly planted trees replace older trees that age.
  • I have been designing custom products for decades with natural latex, which has given me so much freedom, which is why the chiropractic and ergonomics fields have always been my passion.  
  • Memory foam derived from petrochemicals provides less comfort than natural latex foam.
  • When buried, natural latex cushion material decomposes in a year.  
  • In a healthy working environment, latex can help prevent the growth of bacteria, mold, and dust mites. It provides an antifungal and antibacterial environment. 

Memory Foam Seat Cushions

memory foam hand mark left after placing pressure

The astronauts originally used memory foam to protect themselves during space missions. Memory foam is a shock-absorbing material, used in helmets, pads, and other items to protect humans. However, NASA later decided against using memory foam because off-gassing concerns existed.

Here are some reasons why memory foam should NOT be used as a seat cushion:

  • We tested and found that memory foam lacks appropriate responsiveness.  The responsiveness of a cushion determines how quickly and how much it responds to pressure or motion. Using a responsive cushion will help you avoid back pain since it helps you move and shift in a more natural way. 
  • Some people experience discomfort when seated in memory foam due to its tendency to retain their body heat.
  • The main material in memory foam is polyurethane, an oil-refining byproduct.
  • Several harmful compounds are often added to memory foam, including polyurethane, formaldehyde, antimony trioxide, and petrochemicals.
  • As of 2004, all mattresses must be fireproof at a certain temperature point, and the toxicity of foam memory mattresses has increased, making them more hazardous. 
  • In general, polyurethane foam or memory foam that is too cheap collapses easily. After sitting, the pelvis can sink so far into the cushion that it touches the seat directly, causing “bottoming out.” This could get really uncomfortable on the hard wheels below.  
  • If you sit on a memory foam cushion for a long period of time, it is likely that heat and moisture will accumulate. The skin temperature usually rises after a time, which in turn causes sweating. This is part of the body’s reaction to try to cool the area.

The airflow is crucial because it keeps your head cool and comfortable while you sleep, along with keeping your skin protected from temperature changes. A few companies focus on maximizing airflow, but that’s definitely not the norm.

Gel Seat Cushions

purple gel seat foam

Unlike fluid gels, gel cushions usually use polymers to form flat or contoured pieces of material. These blocks of material do not move or flow like fluid gels and are not as effective in reducing pressure or absorbing shock as fluid gels.

We tested numerous types of gel cushions on hundreds of patients, and they did not significantly reduce pressure points or improve comfort. Clients rated the honeycomb-shaped gel cushions the least comfortable (-90%). 

 

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Dr Lawrence Woods DC

Dr Lawrence Woods DC

Founder

My goal is to create the highest quality ergonomic office chairs and accessories for unmatched comfort.

With 30 years of spinal healthcare experience in Ireland as a chiropractor, I learned the value of high-quality sitting for living a happy and healthy life.

I have a Chiropractic Degree from Life Chiropractic College West and I am NBCE Physiotherapy certified.

 

Dr Lawrence Woods

My goal is to create the highest quality ergonomic office chairs and accessories for unmatched comfort. With 30 years of spinal healthcare experience as a chiropractor, I learned the value of high-quality sleep for living a happy and healthy life. I have a Chiropractic Degree from Life Chiropractic College West and am NBCE Physiotherapy certified.

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