If your Tempur-Pedic mattress feels too cold, remove any conventional mattress pad you may have on the bed. A mattress pad will inhibit the Tempur material from producing its therapeutic properties. The mattress needs to be close to your body temperature in order to respond correctly. In addition, Tempur-Pedic recommends keeping your bedroom temperature below 65 degrees Fahrenheit.
If your mattress seems too firm, it may be because your bedroom is too cold. Cooler weather causes the mattress to become softer. A temperature of 65 degrees Fahrenheit is recommended. If your mattress is too soft, you may want to use a conventional mattress pad on your bed. If the responsiveness of the mattress to your body heat is decreased, it will make the mattress seem firmer. Just as it may be too cold in your bedroom if the mattress is too firm, it may be too hot if the mattress is too soft. Remember that your mattress will go through a "softening" period after you purchase it. Don't worry if it seems a bit softer than when you first purchased it. In addition, it may be softer in the areas where you sleep the most frequently.
If your Tempur-Pedic mattress appears to be sagging in the middle, it may actually be because the mattress is on a split foundation. Tempur-Pedic refers to this as the "W" effect. All Tempur-Pedic mattresses will take the shape of their support structure. The use of a box spring will also most likely cause your mattress to sag. If you are using a Tempur-Pedic foundation when the sagging occurs, your foundation may be damaged. Try placing the mattress on the floor to determine if the problem is with the support or the actual mattress. If the foundation is the problem, the mattress will return to its proper shape when placed on the floor.