A. Four keys to keep in mind are support, comfort, space and matching sets. The mattress that's right for you will keep your spine in proper alignment – how your spine is when it's in good standing posture – supporting your body and cradling it along its curves. The right mattress will also be comfortable for your body. Keep in mind that your comfort preferences are likely to change as you age. Make sure the mattress provides enough space for easy, free movement. Couples should sleep on a queen or king-size mattress. And keep in mind that a mattress and foundation are designed to work together. Buy them as a set and get the most out of your investment in yourself.
