A mattress is made up of several key components that contribute to its comfort and support. The most common layers include the comfort layer, which is often made of materials like memory foam or latex to provide cushioning, and the support core, typically made of innerspring coils or high-density foam that offers stability and durability. Additionally, many mattresses feature a pillow top for extra softness and a cover that protects the internal materials. The combination of these components affects the mattress's overall feel, firmness, and longevity, making it essential to choose the right type for individual sleep preferences.