Not all foam mattresses are equal, though, and you'll find different types of foam with different properties.
While technically a material like latex foam can also be considered a foam mattress, its properties are quite different from most other foam mattresses.
The most common types of foam mattresses available are:
This is a foam mattress with closed cells.
Polyether foam mattresses are among the cheapest mattresses on the market.
They don't provide much comfort or stability and are unlikely to last a long time.
We wouldn't recommend purchasing a polyether foam mattress.
Polyurethane foam is commonly also referred to as comfort foam.
This is an open-cell, high resilient foam that's of greater density and much firmer than polyether.
The high resilience also means that it quickly returns to its initial shape.
But, it is still a very cheap foam and we wouldn't recommend investing in a pure polyurethane foam mattress.
Many IKEA mattresses are made of polyurethane foam.
Visco or memory foam
Visco foam - also commonly called memory foam - is the type of foam used for high-quality mattresses.
It is much more comfortable than other foams and offers excellent body support and pressure relief.
But, it also retains much more heat and thus results in a warmer sleeping climate.
It's also more cumbersome to move on and not recommended for very restless sleepers.
All of the foam mattresses we've recommend are predominantly memory foam mattresses.