The cover of the mattress also matters! A good cover should enable the mattress to breathe and dry out rapidly - everybody perspires to some extent when sleeping, and it is important that the cover allows a good degree of ventilation. A natural bamboo fiber acts as a wick, pulling perspiration away from your skin and enabling it to easily evaporate. Bamboo fiber can absorb three times its own weight of moisture, but also enables your bed and mattress to breathe offering a much more comfortable sleep than without it.
There are those who have old and even damaged mattresses with the springs almost coming apart, but one may not necessarily have to buy a new bed as long as one utilizes a thicker foam mattress topper. In fact, there are even those who prefer to layer extra thick memory foam pads on top of a box spring, forming their own custom memory foam bed topper that provides a luxurious feeling. Many people who become accustomed to sleeping on foam mattress toppers will find that when they sleep in another bed, such as in a hotel or on vacation, they truly miss the comfort of the memory foam and have trouble sleeping without it.