There is some debate on the longevity of cooling gel mattress products. One of the complaints about cool gel mattress beds is that the cooling effects wear off after a few years.
A cooling gel memory foam mattress contains chemical composites, so it will not break down as quickly as organic materials. However, some people see the use of chemicals as a drawback, and they may even notice a chemical scent on a new cool gel foam mattress.
The actual lifespan of a cooling gel memory foam mattress depends on its design and quality of the components. Well-made gel foam mattresses with proper support and the right balance of gel and memory foam can last for between 10 and 15 years. Lower-end models that use plastic-based gels and other cheaper components usually last for less than 10 years.
Most high-end gel foam mattresses use polyurethane-based gels, which last longer than those that contain plastics. These products may provide better value than cheaper options when you factor in longevity and comfort.
The combination of gel and memory foam generally provides a bit more support and longevity than memory foam by itself.