We spend 1/3 of our life's in bed, investing in QUALITY bedding is the best thing you can do for yourself. Besides food , shelter and medicine a mattress and foundation is the most important purchase you can make. It is a medical decision.
If you toss and turn, have interrupted sleep, wake up with morning back pain, and wish you had more energy during the day, studies show you probably are not getting quality, REM ( rapid eye movement) sleep. You need to replace your bedding.