【 7-Zone Ergonomic Support & Back Pain Relief 】 This Cornoyu 14 inch king size mattress (80 x 76 x 14 inches) features a medium firm hybrid mattress design engineered with 7 distinct zones targeting the head, neck, back, lumbar, hips, legs, and feet to promote proper spinal alignment. The 3-inch gel memory foam contours to your body, helping reduce lumbar gaps to deliver targeted pressure relief. This mattress provides a balanced feel that supports different body weights and sleeping positions, including side, back, and stomach sleepers. 【 Quiet Sleep & Reinforced Edge Support 】 Sleep undisturbed with the independent pocket spring system designed to enhance stability by absorbing movement at the source. Even if your partner tosses and turns or gets up in the middle of the night, the advanced Motion Isolation ensures that vibrations stay localized. The perimeter is reinforced with 30% denser coils to provide superior support, maximizing your sleeping surface and preventing roll-off. 【 Upgraded Breathable Fabric & Fresh Surface 】 Featuring AATCC 100 lab-tested fabric, the cover ensures a fresh sleep surface that remains skin-friendly. This advanced cooling technology works with gel-infused foam to dissipate heat, ensuring you stay cool throughout the night for a refreshing rest. 【 Fiberglass-Free & CertiPUR-US Certified 】 Designed without fiberglass, this mattress king size model reduces the risk of skin irritation and airborne fiber exposure, offering a safer environment for your home. Made with high-density materials for lasting durability and consistent support, our king size mattresses deliver reliable performance for everyday sleep. Certified materials help create a stable sleep surface designed for comfortable rest night after night. 【 Mattress in a Box & Easy Setup 】 This Cornoyu king mattress fits most standard king size bed frame models, including platform beds, box springs, slatted bases, adjustable frames, and other king bed frame types. It is conveniently compressed for easy delivery and provides a supportive foundation for restorative deep sleep. Box dimensions: 11 x 11 x 78.5 inches. Ideal for master bedrooms, guest rooms, dorms, hotels, and multi-unit apartment furnishing projects. Please unbox carefully following the instructions to ensure safe setup during expansion. It fully expands within 24–72 hours for effortless comfort. Cornoyu 14" King Size Hybrid Mattress offers the ultimate sleep experience through scientific 7-zone ergonomic support. Engineered to align the head, back, and hips, it features 3" gel memory foam for targeted pressure relief and cooling comfort.Enjoy undisturbed rest with an independent pocket spring system providing elite motion isolation. The reinforced perimeter uses 30% denser coils to prevent roll-off and maximize your sleeping area. Prioritizing your health, our skin-friendly cover is AATCC 100 lab-tested for a fresh surface, while the entire mattress is CertiPUR-US certified and 100% fiberglass-free. Delivered as a convenient mattress-in-a-box, it expands within 24–72 hours to fit king-size frame.