Is Memory Foam Hot? Debunking the Temperature Myth.

Memory foam is a popular material used for mattresses, pillows, and other bedding products. It is known for its ability to conform to the shape of the body, providing a comfortable and supportive sleeping experience. However, there is a common belief that memory foam is hot and uncomfortable to sleep on, leading many consumers to avoid the material. In this article, we will debunk the temperature myth surrounding memory foam and explore the science behind its temperature regulation properties.

What Is Memory Foam?

Memory foam is a type of polyurethane foam that was developed in the 1960s by NASA. Its original purpose was to create a material that could cushion astronauts during spaceflight. Today, memory foam is widely used in mattresses, pillows, mattress toppers, and other bedding products. It is known for its ability to conform to the shape of the body and alleviate pressure points, making it a popular choice for people with back pain, joint pain, and other sleep-related issues. Memory foam comes in a range of densities and firmness levels, and it is often combined with other materials such as latex, gel, or cooling fibers to enhance its performance.

Why Do People Believe Memory Foam Is Hot?

The belief that memory foam is hot stems from its viscoelastic properties. When pressure is applied to memory foam, it slowly adjusts and molds to the shape of the body. This process creates a “hug” sensation that many people find comfortable, but it also reduces airflow within the material. As a result, some people may feel that memory foam traps heat and causes them to sleep hot. Additionally, memory foam can absorb body heat and retain it, further contributing to the perception of a warm sleep surface.

Is Memory Foam Really Hot?

Contrary to popular belief, memory foam is not inherently hot. In fact, temperature regulation is a key feature of many modern memory foam products. Manufacturers have developed various technologies and materials to enhance the breathability and cooling properties of memory foam, making it a comfortable and cool sleep surface for many people. Here are some reasons why memory foam may not be as hot as you think:


Density refers to the amount of material per cubic foot in a memory foam product. Low-density memory foam has fewer foam cells per cubic foot, which allows more air to circulate through the material. This can improve the breathability and cooling of the foam. High-density memory foam has more foam cells per cubic foot, which can reduce airflow and contribute to a warmer sleep surface. However, high-density foam is often more durable and supportive than low-density foam, so it may be a better option for people who prefer a firmer feel.

Open-Cell Structure

Some memory foam products feature an open-cell structure, which means that the foam cells are interconnected and allow air to flow freely through the material. This can improve the breathability and cooling of the foam, as well as reduce the perceived warmth of the sleep surface. Closed-cell memory foam, on the other hand, has a denser and more compact structure that can trap heat and reduce airflow.

Cooling Technologies

Manufacturers have developed various cooling technologies to enhance the breathability and temperature regulation of memory foam products. These can include:

  • Gel-infused memory foam: This type of memory foam has gel beads or particles infused into the foam. The gel can absorb and dissipate body heat, creating a cooler sleep surface.
  • Copper-infused memory foam: Copper is a natural conductor of heat and can help regulate temperature in a memory foam product. Copper-infused memory foam may also have antimicrobial properties.
  • Phase-change materials (PCMs): PCM-infused memory foam contains materials that can absorb and release heat depending on the ambient temperature. This can help regulate the temperature of the sleep surface and keep it cool.

Cooling Covers and Mattress Toppers

Some memory foam products come with cooling covers or mattress toppers that are designed to enhance the breathability and temperature regulation of the foam. These can include materials such as cotton, bamboo, or moisture-wicking fabrics that can help dissipate body heat and keep the sleep surface cool. However, it’s important to note that the effectiveness of cooling covers and toppers may vary depending on the quality and thickness of the material.


Memory foam is not inherently hot, and there are many factors that can affect its temperature regulation properties. By choosing a memory foam product with the right density, open-cell structure, and cooling technologies, you can enjoy a comfortable and cool sleep surface. Additionally, pairing your memory foam product with a cooling cover or topper can further enhance its temperature regulation properties. Don’t let the temperature myth prevent you from experiencing the many benefits of memory foam!

Frequently Asked Questions

  • Q: Is memory foam hotter than other mattress materials?
  • A: Not necessarily. While memory foam is often associated with sleeping hot, many other mattress materials such as latex and innerspring can also trap body heat and cause discomfort.
  • Q: Can cooling technologies in memory foam break down or lose effectiveness over time?
  • A: Yes, the effectiveness of cooling technologies in memory foam can depend on various factors such as the quality of the materials used and the overall durability of the product. Over time, cooling technologies may break down or lose effectiveness, which could affect the temperature regulation properties of the foam.
  • Q: Do all memory foam products come with cooling technologies?
  • A: No, not all memory foam products are created equal. Some products may have basic memory foam without any additional cooling features, while others may feature advanced cooling technologies and materials. It’s important to read product descriptions and specifications carefully to determine which memory foam product is right for you.


1. “Memory Foam – What Is It and What Are Its Benefits?” Sleep Foundation, Retrieved from

2. “Most Common Memory Foam Mattress Myths.” Memory Foam Talk, Retrieved from

3. “Memory Foam Guide: Types, Advantages, and Disadvantages.” Mattress Advisor, Retrieved from

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