{"product_id":"extra-firm-king-size-mattress-10-inch-firm-hybrid-king-mattress-for-supportive-pressure-relief-cooling-gel-memory-foam-pocketed-coils-fiberglass-free-certipur-us-certified","title":"Luxysea Extra Firm King Size Hybrid Cooling Mattress","description":"\u003cdiv\u003e\n\u003cp\u003eWake up with zero back strain and consistent spinal alignment each morning on this \u003cb\u003eextra firm king size hybrid mattress\u003c\/b\u003e. Precision-engineered with \u003cb\u003e800+ individually pocketed coils\u003c\/b\u003e and a reinforced lumbar support zone, it delivers targeted orthopedic stability exactly where heavy pressure points require structured uplift.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eVerified Extra Firm Surface:\u003c\/b\u003e Rated a solid 7–8 on the industry firmness scale, this king mattress resists deep indentation, providing a stable platform specifically designed for \u003cb\u003eback and stomach sleepers\u003c\/b\u003e who depend on rigid postural retention.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eActive Heat Dispersion:\u003c\/b\u003e A breathable 3D woven outer cover interfaces directly with a highly ventilated core structure, creating continuous airflow channels that rapidly channel heat away from the sleeper throughout extended rest cycles.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSag-Resistant Foundation:\u003c\/b\u003e High-density support foams integrate seamlessly with the coil network to distribute body weight evenly, eliminating uncomfortable perimeter collapse while ensuring lasting mechanical integrity night after night.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eToxin-Free \u0026amp; Safety Certified:\u003c\/b\u003e Manufactured entirely without fiberglass layers, the interior components utilize dual CertiPUR-US and OEKO-TEX certified formulations that guarantee clean off-gassing and a completely secure indoor air environment.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis mattress arrives safely compressed and requires a full 72-hour expansion window before initial use. Following the unpacking phase, allow your musculoskeletal system approximately two to four weeks to physiologically adapt to the updated support framework. The long-term payoff is a deeply restorative sleep foundation that systematically reduces nightly stiffness and anchors your daily routine in reliable, therapeutic comfort.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"ShipItFurniture","offers":[{"title":"King (U.S. Standard) \/ 10 Inch \/ Extra Firm","offer_id":54521029230902,"sku":"c4f8b387-cf35-40dd-8467-77f92dd31ed8","price":265.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/1746\/3862\/files\/56dd71458722e35bc5b44746d621c3ab.jpg?v=1788791182","url":"https:\/\/shipitfurniture.com\/es\/products\/extra-firm-king-size-mattress-10-inch-firm-hybrid-king-mattress-for-supportive-pressure-relief-cooling-gel-memory-foam-pocketed-coils-fiberglass-free-certipur-us-certified","provider":"ShipItFurniture","version":"1.0","type":"link"}