Types of Mattresses
Innerspring mattresses are the most traditional form of mattress and utilize wire coils as the support structure. Often using layers of foam for additional support, the coils are wire tied and have a strong border wire attached to the perimeter of the coils. The border wire supports the coils to reduce sagging and retain shape integrity. Edges are reinforced with foam or specially produced springs to sustain the sleep surface to the edge, deterring edge breakdown. The comfort layers and upholstery are separated from the innerspring system by a sturdy layer of padding or mesh that prohibits the upholstery from sinking into the coils.
Encased Coil Spring Mattress
Encased (also known as independent or individual) coils are individually fabric wrapped springs. Independently working coils allow for greater body contour and limit motion disbursement. Each encased coil absorbs the weight placed on it without distributing the load to other coils, causing partners to feel each other’s movements far less.
A note about coil numbers and firmness: It was once thought that the support a mattress provided was determined by the number of coils, but this is now known to not be true. The construction of the coils themselves and the preferences of the individual are the more predominate factors in determining the level of support and comfort a mattress will provide. Depending on size, mattresses generally range from 300 to 800 coils, with 500+ coils generally considered “firm”. The “firmness” of a mattress, however, should not be confused with the level of support. Some of the most comfortable, supportive mattresses contain just over 400 coils. Studies by Stanford and Cornell University have concluded that a mattress should support the spine at all points, but still allow it to maintain its natural curve. A mattress that puts the spine into proper alignment and conforms to the body is considered better than an overly firm mattress that may not provide even support and cause discomfort in heavier points like hips and shoulders.
Visco-Elastic Memory Foam Mattress
This mattress is constructed of high-density visco-elastic memory foam that conforms to your body and reduces pressure points. Visco-elastic memory foam was originally developed to reduce the stress of g-forces on astronauts’ bodies during lift-off. It is specially produced, increased density polyurethane foam. It is temperature sensitive and conforms to the body shape immediately, but returns to its original form when not in use. The ability to eliminate pressure points while offering durability makes this material an enticing option for lush comfort and dependable support. Memory foams differ in durability, density, resilience, and tensile strength. Softness or firmness of memory foam (the selection of which is a matter of individual preference) is indicated in its ILD Rating (Indentation Load Deflection). Memory foam provides a natural body alignment.