What is Inside a Memory Foam Mattress?


Memory foam mattresses have become increasingly popular over the last two decades. This is thanks to their ability to:

  • Conform to the body's shape. This helps distribute weight evenly and alleviate pressure points and is particularly beneficial for individuals with back pain, joint pain, and arthritis.
  • Provide a unique combination of comfort and support. It adapts to the body's curves and provides targeted support, making it ideal for those looking for lumbar support or any other form of body support.
  • Absorb movement, which reduces motion transfer. This minimizes sleep disturbances caused by a partner's movements.

Memory foam mattresses also inherently resist mold, dust mites, and other allergens. Their hypoallergenic nature reduces exposure to allergens, promoting respiratory health and overall well-being. And with medical professionals' endorsements, positive online reviews, and increased awareness and marketing, memory foam has become a household staple.

Origins and Development of Memory Foam

Exploring memory foam origins and development in material science for pressure relief demonstrated through womans hands touching mattress layers

But the origins of memory foam can be traced back to the 1960s when NASA embarked on a mission to develop a protective material for astronauts during space travel. The viscoelastic properties of this material allowed it to absorb and distribute the impact forces they experienced during launch and landing. 

Later on, in the 70s, it was adopted for medical applications, particularly bed pads, to prevent pressure ulcers among other health benefits. Memory foam was commercialized in the 80s, with applications in mattresses, pillows, and other comfort products. In the 90s, it became more widely available and gained popularity due to its ergonomic support and pressure-relieving properties.

What is Memory Foam?

Memory foam is a type of polyurethane foam that is renowned for its unique ability to contour to the shape of an object or body. The science behind this mattress technology lies in the unique properties of the material, which is viscoelastic. So basically, memory foam’s material science combines two characteristics:


Viscosity refers to a substance's resistance to flow. Memory foam has a high viscosity, meaning it is slow to return to its original shape after being deformed. This characteristic allows the material to gradually contour to the shape of the body when subjected to pressure and heat.


Elasticity is a material's ability to return to its original shape after deformation. Memory foam also exhibits elasticity, but the key is that it does so slowly. This slow recovery is what distinguishes it from other types of foam.

The term “memory foam” refers to the foam's ability to remember the shape of your body. When you lie down on it, the foam softens and molds to the contours of your body. This distributes weight evenly and reduces pressure points. Once you get up, the foam will slowly return to its original shape.

How is Memory Foam Made?

The main component in memory foam is a polymer called polyurethane. Polyurethane is an incredibly versatile plastic polymer used to produce different materials and products. 

Memory foam is created by mixing polyurethane foam, polyols, isocyanates, and catalysts in a controlled environment to create a viscous liquid. The liquid mixture is then injected into molds and subjected to foaming, which expands and fills the mold cavities. During this process, catalysts are added to initiate the polymerization reaction, transforming the liquid into solid foam.

Once the foam has expanded to the desired size, it undergoes a curing process where the polymerization reaction continues. This process stabilizes the foam structure and gives it its final properties.

The cured foam blocks are then cut and shaped into the desired mattress sizes and components, such as the core support, transition, and memory foam comfort layers. The foam components are assembled and encased in a breathable and durable top cover, completing the mattress construction.

Layers in Memory Foam Mattresses

Pressure relief and body support with material science in memory foam mattresses demonstrated by a woman with an orthopedic pillow

The construction of a memory foam mattress typically consists of multiple layers, each serving a specific purpose. 

  • Top Comfort Layer: A signature component of a memory foam mattress. It is the part of the mattress that allows you to sink into the bed and experience the unique feel of its softness.
  • Transition Layer: Positioned between the softer top layer and the firmer support core, the transition layer helps distribute weight evenly, preventing you from sinking too deeply into the mattress. 
  • Support Core: The support core is the foundational layer that provides overall support to the mattress. Usually made of high-density polyfoam, though some mattresses use innerspring coils or a combination of materials.
  • Base Layer: The base layer reinforces the mattress's overall structure and ensures durability. It is the foundation for the entire mattress, providing stability and support. 

Different Types of Memory Foam 

Traditional Memory Foam

This is the classic or original memory foam that NASA developed. It responds to heat and pressure, contours to the body's shape, and offers excellent support and pressure relief. However, traditional memory foam can retain heat, which may be a consideration for individuals who sleep hot.

Open-Cell Memory Foam

Open-cell memory foam has a more breathable structure. Its construction allows air to circulate through the foam, helping to dissipate heat and maintain a cooler sleeping environment. Open-cell memory foam is an excellent option if you're concerned about sleeping hot. But it tends to wear out faster because of the material quality.

Gel-Infused Memory Foam

Gel-infused memory foam incorporates gel beads or particles into the foam to enhance its thermal properties. It is designed to provide a cooler sleep surface than traditional memory foam. The gel has natural cooling properties and can help regulate body temperature while you sleep. But gel is just one of the many comfort features that manufacturers use. Some memory foam mattresses also integrate copper or granite for their heat dissipation effects.

At The Bedding Mart, we understand the importance of a good night's sleep and the role the right mattress can play in achieving it. That's why we offer a wide range of memory foam mattresses, each designed to provide the perfect level of comfort, support, and pressure relief for individual sleep needs.

Memory Foam Mattresses for Every Sleeper

Advancements in material science offering body support through innovative mattress technology with memory foam

Our collection features memory foam mattresses with varying firmness levels, from soft and plush to firm and supportive. We also offer a variety of memory foam types, including gel-infused memory foam for enhanced breathability and open-cell memory foam for increased responsiveness.

How to Go About Choosing a Mattress

To choose the best memory foam mattress, consider your sleep preferences, body weight, and any specific pain or discomfort you may experience. For instance:

  • Back sleepers: A medium-firm memory foam mattress provides an ideal balance of support and pressure relief for back sleepers.
  • Side sleepers: A softer memory foam mattress offers more cushioning and contouring to alleviate pressure points on the hips and shoulders.  
  • Stomach sleepers: A firmer memory foam mattress offers the support to help maintain proper spinal alignment for stomach sleepers. 
  • Individuals with back pain: A zoned memory foam mattress provides targeted support for the lower back, reducing pain and improving sleep quality.  
  • Hot sleepers: Gel-infused memory foam mattresses offer enhanced breathability and cooling properties to promote a more comfortable sleep environment.

The Bedding Mart: Your Sleep Solution

At The Bedding Mart, we're committed to helping you find the perfect mattress for a truly rejuvenating sleep experience. Our staff can guide you through our selection and answer any questions. Visit The Bedding Mart today and discover the transformative power of memory foam mattresses.

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