The most widely purchased type of bedding uses the support of tempered steel coils in a variety of configurations. Layers of upholstery provide insulation and cushioning between your body and the spring unit. The result of this basic approach, coupled with state-of-the-art technology, is a full range of comfort choices.

Solid foam mattresses also offer a wide choice of "feels." They can be made of a solid core or of several layers of different types of foam laminated together. Advanced technology in polyurethane foams, refinements to traditional latex and the new visco-elastic ("memory") foams have added to the choice of comfort, support and performance.

Electrically adjustable bases allow sleepers to adjust the head and foot of the bed to the most comfortable position. The mattress and foundation must be specially built for the flexing motion and can be innerspring, foam or a combination. Since the flexing causes extra wear on the mattress, quality construction is very important. Mattresses not built for this purpose should not be used with an adjustable bed frame.

A good foundation is as important as a good mattress. The foundation takes a lot of the nightly wear and tear and contributes to the bed's overall comfort and support. Never put a new mattress on an old foundation. When you select your new mattress, buy its companion foundation – the two are designed to work best together. In fact, buying the mattress without its matching foundation may affect the terms of the warranty

Just as your bed should provide good support for your body, your pillow should give you the right cushioning to position your head and neck properly. It should hold your head in the same relation to your shoulders and spine as if you were standing with correct upright posture. If you sleep on your side, you may want a fairly firm pillow to give your head and neck extra support. If you sleep on your back, try medium-firm pillows to cradle your head with more "give." And if you sleep on your stomach (although some physicians caution against this position), choose a soft pillow to lessen the strain on your neck.