{"product_id":"serta-perfectsleeper-grantchester-extra-firm","title":"Serta Perfect Sleeper Grantchester Extra Firm","description":"\u003cdiv data-v-c5295f7c=\"\" data-auto=\"product-long-description-section\" class=\"long-description medium margin-bottom-m\"\u003e\n\u003cdiv data-v-c5295f7c=\"\"\u003eBuilt for unwavering stability, this Serta Perfect Sleeper Grantchester extra firm mattress is driven by the Q4 Support System to distribute weight evenly and maintain a consistently firm sleep surface over time. Quilt Loft HD Memory Foam adds cushioning at the top layer while Cool Feel technology regulates heat, and adjustable base compatibility gives you full positional control for restorative rest.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cul data-v-c5295f7c=\"\"\u003e\n\u003cli data-v-c5295f7c=\"\" class=\"column\" data-auto=\"product-summary-section\"\u003e\n\u003ch4 data-v-c5295f7c=\"\" class=\"medium margin-bottom-xxs\"\u003eFeatures\u003c\/h4\u003e\n\u003cdiv data-v-7f879aea=\"\" data-v-c5295f7c=\"\"\u003e\n\u003cul data-v-7f879aea=\"\" class=\"margin-left-xs\"\u003e\n\u003cli data-v-7f879aea=\"\"\u003e\u003cspan data-v-7f879aea=\"\" data-testid=\"other-type\"\u003eMattress height approx. 14\"\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-v-7f879aea=\"\"\u003e\u003cspan data-v-7f879aea=\"\" data-testid=\"other-type\"\u003eInnerspring\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-v-7f879aea=\"\"\u003e\u003cspan data-v-7f879aea=\"\" data-testid=\"other-type\"\u003eExtra firm\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-v-7f879aea=\"\"\u003e\u003cspan data-v-7f879aea=\"\" data-testid=\"other-type\"\u003eTop type: tight top\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-v-7f879aea=\"\"\u003e\u003cspan data-v-7f879aea=\"\" data-testid=\"other-type\"\u003eCompatible with an adjustable bed\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-v-7f879aea=\"\"\u003e\u003cspan data-v-7f879aea=\"\" data-testid=\"other-type\"\u003eBox spring\/foundation available (9\" standard or 5\" low profile)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-v-7f879aea=\"\"\u003e\u003cspan data-v-7f879aea=\"\" data-testid=\"other-type\"\u003eCoolFeel fabric; QuiltLoft HD memory foam; Q4 support system; zoned support\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-v-7f879aea=\"\"\u003e\u003cspan data-v-7f879aea=\"\" data-testid=\"other-type\"\u003eExtra firm for stomach and back sleepers with extra support\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-v-7f879aea=\"\"\u003e\u003cspan data-v-7f879aea=\"\" data-testid=\"other-type\"\u003eMeets federal fire safety standard\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-v-7f879aea=\"\"\u003e\u003cspan data-v-7f879aea=\"\" data-testid=\"other-type\"\u003eCertiPUR-US certified foam\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-v-7f879aea=\"\"\u003e\u003cspan data-v-7f879aea=\"\" data-testid=\"other-type\"\u003eWarranty: 10-year \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Serta","offers":[{"title":"Twin \/ Mattress only","offer_id":43852444893302,"sku":null,"price":1349.99,"currency_code":"USD","in_stock":true},{"title":"Twin \/ Regular Profile Foundation","offer_id":43852444926070,"sku":null,"price":1499.99,"currency_code":"USD","in_stock":true},{"title":"Twin \/ Low Profile Foundation","offer_id":43852444958838,"sku":null,"price":1499.99,"currency_code":"USD","in_stock":true},{"title":"Twin XL \/ Mattress only","offer_id":43852444991606,"sku":null,"price":1399.99,"currency_code":"USD","in_stock":true},{"title":"Twin XL \/ Regular Profile Foundation","offer_id":43852445024374,"sku":null,"price":1599.99,"currency_code":"USD","in_stock":true},{"title":"Twin XL \/ Low Profile Foundation","offer_id":43852445057142,"sku":null,"price":1599.99,"currency_code":"USD","in_stock":true},{"title":"Full\/Double \/ Mattress only","offer_id":43852445089910,"sku":null,"price":1399.99,"currency_code":"USD","in_stock":true},{"title":"Full\/Double \/ Regular Profile Foundation","offer_id":43852445122678,"sku":null,"price":1599.99,"currency_code":"USD","in_stock":true},{"title":"Full\/Double \/ Low Profile Foundation","offer_id":43852445155446,"sku":null,"price":1599.99,"currency_code":"USD","in_stock":true},{"title":"Queen \/ Mattress only","offer_id":43852445188214,"sku":null,"price":1399.99,"currency_code":"USD","in_stock":true},{"title":"Queen \/ Regular Profile Foundation","offer_id":43852445220982,"sku":null,"price":1599.99,"currency_code":"USD","in_stock":true},{"title":"Queen \/ Low Profile Foundation","offer_id":43852445253750,"sku":null,"price":1599.99,"currency_code":"USD","in_stock":true},{"title":"King \/ Mattress only","offer_id":43852445286518,"sku":null,"price":1699.99,"currency_code":"USD","in_stock":true},{"title":"King \/ Regular Profile Foundation","offer_id":43852445319286,"sku":null,"price":1999.99,"currency_code":"USD","in_stock":true},{"title":"King \/ Low Profile Foundation","offer_id":43852445352054,"sku":null,"price":1999.99,"currency_code":"USD","in_stock":true},{"title":"California King \/ Mattress only","offer_id":43852445384822,"sku":null,"price":1699.99,"currency_code":"USD","in_stock":true},{"title":"California King \/ Regular Profile Foundation","offer_id":43852445417590,"sku":null,"price":1999.99,"currency_code":"USD","in_stock":true},{"title":"California King \/ Low Profile Foundation","offer_id":43852445450358,"sku":null,"price":1999.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0086\/2263\/7116\/files\/xf7_2f7092e4-99e0-4405-abb2-5697d62bf06f.webp?v=1784306766","url":"https:\/\/mattresskingonline.com\/products\/serta-perfectsleeper-grantchester-extra-firm","provider":"Mattress King","version":"1.0","type":"link"}