A "Pillow Top" mattress features an additional layer of soft padding sewn onto the top of the mattress. This layer is designed to provide extra comfort and cushioning, making it feel plush and inviting. Pillow tops can be made from various materials, including memory foam, latex, or polyester, allowing for different levels of support and softness. These mattresses are popular among those who prefer a softer sleeping surface. The added cushioning can help relieve pressure points, making it easier to sleep comfortably. However, it's important to consider that pillow tops may require more maintenance and can wear out faster than traditional mattresses.