An innerspring mattress uses a steel coil support system. Manufacturers offer several different types of spring systems, including units with springs connected into a single unit and individually wrapped pocketed coils. Spring shapes, designs, coil gauge, and number of coils in a mattress can vary. The innerspring is covered by padding or upholstery materials, which can include various foams, fiber, and additional layers of smaller steel springs. Coil count can be more arbitrary, but the idea is that the greater the number of coils, the more points of support and greater distribution, thus the better the bed can contour and support the sleeper.
Foam mattresses use one or more types of foam as the support system. The foam may be polyurethane foam, memory (or visco elastic) foam, or latex foam, and can contain gel or other materials. The foam used in such mattresses can be manufactured in a variety of shapes and densities to offer consumers a mattress that has different comfort, feel and heat dissipation features.
Memory foam (visco) Mattress:
Memory foam (or visco elastic foam) mattresses use a high density polyurethane foam as the support system, in the upholstery layer, or both. This foam has properties that allow it to contour closely to the shape of the sleeper.
Pillow top mattress:
Pillow top mattresses provide an additional upholstery layer sewn into the top of the mattress. This layer can be made from a variety of fiber and foam materials.
Gel mattresses use a type of foam that contains gel in the product’s support system, upholstery layers, or both. The gel is added to the foam using deferent types of technology. The gel foam can offer consumers different comfort, feel and heat dissipation features.