Memory foam is a type of synthetic material known as viscoelastic polyurethane foam. It is made primarily from polyurethane with added chemicals that increase its viscosity and density, giving it unique properties of both viscosity (slow to change shape under pressure) and elasticity (ability to return to its original shape after deformation)
. Originally developed by NASA in 1966 for aircraft cushions, memory foam is temperature-sensitive and reacts to body heat and pressure by softening and molding to the contours of the body. This allows it to evenly distribute weight and provide support, making it ideal for mattresses and other cushioning applications
. Key characteristics of memory foam include:
- Softness and durability with heat-wicking abilities that help keep sleepers cool
- Pressure relief by minimizing stress on joints and pressure points, which can improve sleep posture and reduce pain
- Hypoallergenic properties that reduce allergens in the sleeping environment
- Motion isolation, allowing partners to sleep undisturbed by each other's movements
- Slow "spring back" behavior, meaning it gradually returns to its original shape after pressure is removed
Memory foam is used in various products such as mattresses, pillows, wheelchair cushions, and sports equipment padding. It comes in different densities and firmness levels to suit different preferences and needs
. In summary, memory foam is a high-density, viscoelastic polyurethane foam that molds to the body in response to heat and pressure, providing comfort, support, and pressure relief, widely used in bedding and medical applications.
