***only reference***JustRoomy King Size Mattress Firm Mattress 14 Inch for Back Pain Relief,Breathable Cooling Ice Silk Top,Gel Memory Foam, Individual Pocket Spring, Hybrid Mattress King in a Box CertiPUR-US Certified

Additional Details from the Manufacturer

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More features

• Optimized Firm Support: This 14 inch firm mattress masterfully blends a supportive core with a plush Euro Top. The 6.6cm sponge and gel memory foam layer contours to your body, while the firm interior provides "pressure-free" support, reducing back pain and minimizing tossing and turning. Perfect for back pain crowds and seniors
• Uninterrupted Sleep: Featuring 960 individually wrapped pocket springs, this hybrid king mattress offers precise, independent support. It effectively absorbs movement, ensuring zero disturbance from a partner. Reinforced edges prevent roll-off, maximizing the usable sleep surface of this supportive firm mattress
• Certified Safety & Durability: Rest assured with certifications from CertiPUR-US, OEKO-TEX, and ISPA. This fiberglass-free hybrid mattress is built with high-quality materials and hundreds of durable carbon steel springs, ensuring lasting support, quiet resilience, and a healthy sleep environment for your family
• Dual Cooling & Comfort: Experience our hybrid cooling system: a premium, mid-molecular weight ice silk fabric combined with gel-infused memory foam. This firm king mattress actively reduces perceived temperature by 2-3°C, ensuring a breathable, skin-friendly, and consistently cool sleep all night. Ideal for hot sleepers
• Convenient "Bed-in-a-Box": Your firm king mattress arrives compressed in a box for easy setup. Simply unbox, unroll, and allow 72 hours for full expansion to its optimal 14 inch height. It's compatible with most bed frames, box springs, slatted bases, or platform beds, offering hassle-free durability