Experience unparalleled comfort with the Dura-Last Fortress Gentle Firm mattress from Spring Air. Engineered for heavy-duty performance, this mattress features a cooling cover layer of FR fiber paired with 1.8 density foam, providing 50% higher density than standard options. With 2 inches of LX foam, twice the density of other upholstery foams, and 13 gauge pocket coils, it guarantees exceptional support, durability, and stability. Strategically built to achieve the ideal balance of comfort and resilience, the Dura-Last Fortress significantly outperforms standard mattresses and comes with an increased warranty for peace of mind. Sleep soundly with Mattress Express, where quality and innovation meet restful nights.