People typically keep a mattress for 7 years or more. That's 7 years of built up sweat, moisture, dirt, dust and more all getting caught up within your mattress. With this particular mattress though, you can breath a sigh of relief. With this mattress you can remove the main cover and wash it separately. This means you can remove all the dirt and grime and sweat build up over the years resulting in a nice and fresh mattress