Memory foam consists mainly of polyurethane as well as additional chemicals increasing its viscosity and density. It is often referred to as "viscoelastic" polyurethane foam, or low-resilience polyurethane foam (LRPu).
Too often in interior design, we see wall art or paintings treated as an afterthought. They're what gets dealt with last, long after the final coat of paint has dried on the walls and all of the furniture has been artfully arranged, if it gets dealt with at all.
Buying a mattress over the years has become harder and harder. Atypical visit to an Expo fair or a Furniture Mall will have more than 20 something brand retailers touting their goods. Each retailer brand will be claiming to be the best.
Many mattresses manufactured over the last two decades may actually be bad for you. The western way to health has been typically to "target and destroy" the "bad". This sometimes mean choosing the lesser of two evils. Many old mattress contains copious amounts of chemicals to produce key features such as "Anti-Static" and "Anti-Dust Mite".