Innerspring mattresses are a popular type of mattress that use a core of metal coils to provide support. These coils are designed to respond to body weight and movement, offering a balance of comfort and firmness. The number and arrangement of coils can vary, affecting the mattress's overall feel and durability. Typically, innerspring mattresses are topped with layers of padding, such as foam or fiber, to enhance comfort. They are known for good airflow, which helps regulate temperature during sleep. Many people choose innerspring mattresses for their affordability and wide range of options available in the market.