I just saw a commercial and this company said every 8 years you need a new Mattress. Also, they said about 8 years that your Mattress will be filled with , I think they said dust mites. Now, this may be a selling tactic for the Holidays, I'm not sure. I have had the same Mattress which is a Tempur Pedic I bought in 2001 and it seems to be fine. I know this is very off topic for a BB Forum, I'm just very curious. Thanks in advance!