Mattresses typically have two main parts: The core, which contains the spring and foam to add support to the mattress, and the upholstery, which provides comfort and luxury. Both parts need to be of superb quality and craftsmanship in order to work best and last for a long time. Mattresses by King Koil have a reputation for high-quality mattress parts, and their upholstery layers are top-notch. When you are lying on a mattress, you want to make sure the surface you are on is comfortable. While the springs and foam inside provide the comfort you need, it's the upholstery that will provide that extra comfort need for a good night's sleep. Using a variety of different foams and fibers, King Koil has provided a line of mattresses that have upholstery layers that just can't be beat. If you're shopping for a new mattress, make sure you are getting one that will provide you with the cushioning and support you need. King Koil offers a line of specially designed mattresses, each one giving you varying foam and fiber types and densities that make up the upholstery. Choose the mattress that you feel best suits your comfort needs. By doing so, you are ensuring that you will have the best night's sleep on a mattress that you can trust.