Vivon 11 Inch Hybrid iCoil Spring Mattress, Cal King Restech memory foam is our unique formula that uses natural coconut oil and is infused with green tea extract to help control odors in a natural way 2 inch top layer of gel-infused Restech memory foam, 1 inch high density support foam, 7 inch iCoil support base, 1 inch foam encasement A soft polyester knit jacquard fabric cover with dark blue satin trim along the border Ideal for back and stomach sleepers and individuals seeking a medium-firm sleep surface CertiPUR-US certified foam