{"product_id":"king-12-inch-memory-foam-mattress-in-a-box-cooling-knit-cover","title":"King 12 Inch Memory Foam Mattress in a Box - Cooling Knit Cover","description":"\u003cp\u003eIn this review of the King 12 Inch Memory Foam Mattress in a Box, the bottom line is simple: this mattress is best for sleepers who want firm, reliable support with effective temperature regulation. The reviewer found it particularly helpful for those with lower back or hip pain because the layers of memory foam cradle pressure points while the cooling knit fabric stays cool-to-the-touch. Setup is straightforward and the mattress expands within about 12 hours, making it a practical option for people who need a fast, low-fuss refresh to their sleep surface.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCooling Knit Fabric Cover:\u003c\/strong\u003e The breathable cover helps move heat away from the body so sleepers feel cooler throughout the night.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThree-layer memory foam:\u003c\/strong\u003e Layered foam construction cradles the body to reduce tossing and turning and to relieve common pressure points.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCopper memory foam:\u003c\/strong\u003e The copper-infused layer provides a responsive, cradling feel that improves support without feeling overly soft.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCertiPUR-US \u0026amp; Oeko-Tex certified:\u003c\/strong\u003e Independent certifications mean the mattress foams and fabrics were evaluated to be free from many harmful substances.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasy setup:\u003c\/strong\u003e The mattress ships compressed in a box and regains its shape after about 12 hours, making installation quick on most frames or platforms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e10-year limited warranty:\u003c\/strong\u003e The warranty provides added confidence for long-term daily use and normal wear.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis mattress is well suited to back and stomach sleepers who prefer a firmer, supportive feel that keeps the spine aligned. Shoppers who value temperature regulation will appreciate the cool-to-the-touch knit cover and breathable construction. Couples who need a balanced mix of support and pressure relief may also find it a good match.\u003c\/p\u003e\n\u003cp\u003eThose who prefer a plush, sinking memory foam experience or who require very soft cushioning for shoulder pressure should look elsewhere. Also, customers who expect a trial return after opening should note this mattress cannot be returned once opened, although it carries a 10-year limited warranty for defects.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFirm and supportive feel that reduces hip and back pain for many users.\u003c\/li\u003e\n\u003cli\u003eCooling knit fabric and breathable layers help with temperature regulation through the night.\u003c\/li\u003e\n\u003cli\u003eCertifications from CertiPUR-US and Oeko-Tex provide reassurance about harmful substances.\u003c\/li\u003e\n\u003cli\u003eEasy setup from a boxed delivery and a decade-long limited warranty.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFirmness may be too strong for side sleepers who need more contouring at the shoulders.\u003c\/li\u003e\n\u003cli\u003eCannot be returned after opening, so buyers should be certain of fit and feel before unboxing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eSize\u003c\/td\u003e\n\u003ctd\u003eKing 76 x 80 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProfile\u003c\/td\u003e\n\u003ctd\u003e12 in total thickness\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCover\u003c\/td\u003e\n\u003ctd\u003eCooling knit fabric cover, breathable and cool-to-the-touch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstruction\u003c\/td\u003e\n\u003ctd\u003e3-layer memory foam with copper memory foam layer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertifications\u003c\/td\u003e\n\u003ctd\u003eCertiPUR-US and Oeko-Tex Standard 100 certified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e10-year limited warranty\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eMade in the USA of US foam and global materials\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe King 12 Inch Memory Foam Mattress is a solid choice for sleepers seeking a firmer, supportive mattress with effective temperature control and reputable certifications. It delivers good back support and pressure relief for many users and is good value for those who prioritize a cool, stable sleeping surface and a simple boxed setup.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHow long does the mattress take to expand?\u003c\/strong\u003e\u003cbr\u003eThe mattress typically regains its full shape within about 12 hours after unboxing, though it may continue to off-gas mildly for a short time.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill the mattress fit adjustable bed frames?\u003c\/strong\u003e\u003cbr\u003eYes, the mattress can be used on adjustable beds, box springs, slatted platforms, foundations, and directly on the floor.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs the foam certified for safety?\u003c\/strong\u003e\u003cbr\u003eYes, the foams and fabrics carry CertiPUR-US and Oeko-Tex Standard 100 certifications indicating independent evaluation for certain harmful substances.\u003c\/p\u003e","brand":"Dyonery","offers":[{"title":"Default Title","offer_id":48749498990811,"sku":"B0CNSVGJS2","price":439.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/81zkABB226L._AC_SL1500_3403cd40-eb86-4043-af1a-72349e511bca.jpg?v=1778776738","url":"https:\/\/gearmusthave.com\/products\/king-12-inch-memory-foam-mattress-in-a-box-cooling-knit-cover","provider":"GearMustHave","version":"1.0","type":"link"}