You should change your California King memory foam set
when it doesn't support your body properly any longer. The main sign that your California King set needs replacement is when you wake up and need to stretch you back to start your day or a stiff neck. Everybody's body is different and usage of mattress varies from person to person on average 7 to 8 years. People that sit on their California King mattress or watch TV on it might have to replace sooner than those who only sleep on it.