Memory foam, in general, is a type of polyurethane foam that has viscoelastic properties. This means it is both viscous and elastic, allowing it to conform to the shape of an object when pressure is applied and then slowly return to its original shape once the pressure is removed. This characteristic makes it particularly supportive and comfortable, as it molds to the contours of the body, helping to alleviate pressure points and provide customized support. In daily life, memory foam has been widely used in a variety of life improvement products, such as pillows, mattresses and toppers, travel products, lumbar…

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