Final answer:
A mattress is a bed covered by padding or upholstery materials, such as foam and fiber. Memory foam is a type of foam material that offers superior comfort and support in mattresses and pillows.
Step-by-step explanation:
A mattress is a type of bed covered by padding or upholstery materials. The padding or upholstery materials can include various foams, fibers, and additional layers of smaller steel springs. For example, memory foam is a type of foam material that offers superior comfort and support by absorbing energy and contouring to the body. It is commonly used in mattresses, pillows, and other products to provide a restful sleep experience.