Memory foam, or Visco elastic foam as it is technically called, is very effective in the medical field as it reduces the pressure points. This quality ensures that people who are bed ridden do not develop bed sores. This kind of mattress is also relatively inexpensive and thus very cost effective. Another positive factor is its durability. A normal spring mattress lasts for 4-5 years. However, memory foam lasts for 15-20 years. Memory foam is also affected by temperature; hence it is a wonderful way to provide rest to your pressure points. Those parts of the body which rest heavily on the foam transfer more heat. Therefore, the mattress becomes softer right where it is required most. Hence one thing is for sure, if you decide to buy memory foam, it will change your life for the better.