Product Description

The King Koil Xtended Life Extra Firm mattress at Best Mattress in Las Vegas, NV, and St. George, UT, is designed for sleepers who want uncompromising support, long-lasting durability, and a cooler, deeper night’s rest. With a precise balance of advanced foams, resilient coils, and cooling latex, this mattress delivers the kind of restorative sleep that helps you feel strong, energized, and ready for the day.

Cradling Comfort & Pressure Relief

Layers of memory foam and Talalay latex work together to contour to your body, cushioning your hips, shoulders, and back for even support. By reducing pressure points and improving circulation, the Xtended Life Extra Firm mattress helps eliminate tossing and turning so you fall asleep faster and stay asleep longer.

Cool, Breathable Sleep

Engineered with graphite-infused Talalay latex, this mattress naturally draws heat away from your body while promoting airflow through its open-cell design. That means your sleep surface stays cool, consistent, and comfortable throughout the night—perfect for hot sleepers in the desert climates of Las Vegas and St. George.

Strong, Stable Support

At the core, a durable encased steel coil system delivers zoned stability and all-night spinal alignment. Each coil responds individually to movement, minimizing partner disturbance and keeping your body supported in every sleep position. The result is consistent, dependable comfort whether you sleep alone or share the bed.

Built to Last

Unlike mattresses that break down and sag over time, the Xtended Life collection is crafted with high-density Everlast™ foams and premium construction to ensure strength, resilience, and long-term comfort. Backed by an incredible 25-year warranty, this mattress is built to deliver decades of restful nights without sacrificing performance.

Certified for Peace of Mind

Every layer of foam in this mattress is CertiPUR-US® certified, meaning it’s free from harmful chemicals, safe for your home, and engineered to perform for years.

Sizes to Fit Every Bedroom

– Twin: 38″ x 75″
– Twin XL: 38″ x 80″
– Full: 54″ x 75″
– Queen: 60″ x 80″
– King: 76″ x 80″
– Cal King: 72″ x 84″

The King Koil Xtended Life Extra Firm mattress isn’t just a mattress—it’s a long-term investment in your sleep health. With unmatched durability, cooling comfort, and tailored support, it’s the ideal choice for anyone seeking rejuvenating rest, night after night.