Experience a new level of sleep innovation with the Kingsdown Silent Partner X1F Extra Firm Mattress, engineered for maximum support, cooling, and durability. Designed with XTech’s exclusive Support System, this mattress features gradient wave coils in the center third, providing targeted lumbar support and pressure relief for shoulders and hips. For undisturbed rest, Motion Separation Foam acts as a buffer between coils, minimizing motion transfer, while dual reinforced-edge support coils ensure a firmer sitting edge and extended mattress lifespan. Stay cool and comfortable all night with XTech Cool Strips, strategically embedded heat-releasing graphite strips that help regulate body temperature while reducing heat transfer between sleep partners. The XTech Carbon Thread Fabric, woven with a trilobal carbon thread, releases tension and lowers cortisol levels, promoting deeper relaxation and recovery. The addition of Silver Anti-Microbial Protection helps minimize allergens, ensuring a cleaner, healthier sleep surface. For enhanced breathability and softness, the quilting is infused with silk and hollo fiber, creating a cooling effect while maintaining plush surface comfort. The extra firm foam layers in both the upholstery and quilting provide advanced pressure relief and robust support, making this mattress an excellent choice for those who prefer an extra firm sleep surface. Upgrade your sleep with the Kingsdown Silent Partner X1F Extra Firm Mattress—where cutting-edge technology, targeted support, and premium cooling features come together for an exceptional night’s rest.