If you buy a good one, a memory foam mattress will provide a comfortable place for you to sleep on for years to come. If you buy a cheap imitation, of which there are a lot of available, you will not only be uncomfortable but also the mattress will only last a short time. It is true that a real memory foam mattress can be expensive but you have to pay the price if you want a mattress that is of good quality that will last a long time. One of the best is the TempurPedic memory foam mattress because it is of the best quality and will last a lifetime. This mattress is much better than others in the mattress industry. Of all the other companies that make this type of mattresses this is the best.There is no requirement for the Tempur-Pedic mattress to have a box spring underneath it. This mattress has a 5" base of polyurethane with a 5.3 lb of memory foam over it. It also comes with a 20 year warranty and a free trial period of 3 months. This type of warranty means that the mattress is of high quality and that it will last a lifetime. The trial period means that they have confidence in the mattress and that they believe that you will love it. These are the reasons that this mattress is so popular and is of the highest quality. You simply have to follow the instructions that come with the mattress to take care of it. Look out for ant defects in the mattress. If you find a defect make sure that it is covered by the warranty before having it replaced or follow the instructions on the warranty instructions as to what you can do about it. Remember that if you want a mattress that will last a lifetime and is of the highest quality, TempurPedic stands by their mattress and listen to the customer feedback to continue to make a better mattress. The warranty ensures that the mattress will last a minimum of 20 years if you ensure that you read the warranty and know how to take care of the mattress. One of the best reasons that this memory foam mattress is so popular is that it has been extensively tested and considered to be the most comfortable mattress on the market. This is particularly true if you move about or toss and turn in your sleep because this mattress bounces back more consistently and better than any other mattress on the market. This will help to ensure that you get a good night's sleep. That is why this mattress is so expensive.