To give a piece of foam memory, you start with a synthetic polyurethane foam material and add certain types of chemicals which add an increase in weight or density to the foam. With the addition of these chemicals, a non-toxic, visco-elastic foam material is created. Visco-elastic can be synonymous with memory foam. Some like to refer to this as “viscoelastic memory foam.” However, there are many features along the way that will help determine what type of memory foam you end up with. To understand exactly what differences are found in each final product, you first have to start with understanding how to grade each foam.e.
With the success of Tempur-Pedic® mattresses, other foam manufacturers in Canada and the United States began to develop their own visco-elastic memory foam material to offer to mattress, upholstering and specialty products companies the ability to allow consumers to have a variety of options and price levels to choose from.
The differences in memory foam will be outlined in the following paragraphs, and will hopefully enable the consumer to make an informed and savvy decision about which foam mattress product best suits their particular needs.