Replacing a Sleep Number mattress depends on several factors, including usage, maintenance, and personal comfort preferences. Generally, mattresses are recommended to be replaced every seven to ten years. However, Sleep Number mattresses are designed with durability in mind, often lasting longer due to quality materials and engineering. Signs that it may be time to replace your mattress include noticeable sagging, decreased support, or persistent sleep discomfort. It is also essential to keep in mind any changes in personal health or sleeping habits, which may affect your ideal sleep system. Regular cleaning and proper maintenance can prolong the lifespan of your mattress. If you have specific concerns regarding your Sleep Number mattress, it may be helpful to consult the guidance available on the Sleep Number website or relevant resources.