Linenspa 11 Inch Luxury Gel Memory Foam Mattress - Plush Ventilated Top Layer - CertiPUR-US Certified - Split California King 2 Pieces NOTE: PLEASE CHECK THE "Sold by" SELLER NAME, located directly above product sizes. Only products sold by LINENSPA are GUARANTEED GENUINE. If you order from a different seller, you will not receive the GENUINE PRODUCT that is shown and advertised. Luxurious 11-inch Medium Feel mattress features a 1.5-inch top layer of ultra-plush ventilated gel memory foam, a 2-inch layer of plush gel memory foam, and 7.5 inches of supportive high density base foam - conveniently compressed and shipped in a box Top layers are made of 3.5 inches of memory foam infused with gel beads that capture and distribute heat to regulate temperature Surface layer of memory foam has a ventilated design that improves airflow, breathability and comfort Soft, removable cover has a cushioning air layer (quilting pattern of cover may vary from product images); 10-year warranty on mattress and cover