What is the best memory foam mattress is not a simply answered question, as each person sleeps differently. Fortunately, there are lots of styles, densities, and thicknesses of memory foam mattresses and mattress toppers. Which mattress you choose varies based mostly on how you sleep.
Though it is suggested for side sleepers to obtain a lower density mattress, it's still important to have a 4-5 lb density mattress. The denser the memory foam, the more the life span from the mattress. A lot of companies offer densities which range from 3-7 lbs.
The Tempur-Pedic company brought best memory foam mattress to the public in the early 1990s, and also the mattresses have been gaining market shares ever since. Though that's the designer brand, there are myriad other companies that offer visco-elastic foam mattresses and mattress toppers for a fraction from the cost. When buying a discount mattress, be sure to check the materials that they are given; some have harsh chemicals inside them, and others are constructed with much less dense foam. Thin foams feel extra soft at first, but it takes very little time prior to the material degrades and also you sink into your mattress. Most visco mattresses are petroleum based, so they can have an incredibly harsh chemical scent once they arrive on your doorstep (one way to avoid the scent is by using green tea extracts, added by many companies up layers of your mattress).
So must you purchase the most expensive brand for safety? Of course not. There are lots of center of the road brands that will meet your requirements just fine. Be wary of buying from the company that has no warranty or guarantee policy; firms that know their products will last for a long time tend to be more prepared to back those statements up with a guarantee to replace or refund products. Sometimes, buying the cheap mattress is more expensive over time, especially if it needs to be replaced every few years. Get a mattress cover and clean it regularly and you will add many years of life to your memory foam mattress or mattress topper.