You are sure to find the size that best fits your sleep space—whether that is a bedroom at home, a custom bunk bed, or even an RV sleep nook. (We offer hard to find RV bunk measurements and RV king sizes, all conveniently light weight.) A split California King, 36 by 84 inches. Keep your investment secure no matter where life takes you. This all-foam design is protected from splashes and spills thanks to our innovative Nano Stain Terminator protector. (Sewn-on cover for your convenience.) Our dense foams are built to last a decade all while keeping you cool. Our gel swirl memory foam eliminates hot nights and keeps you cool. Our all-foam design gives you the response, contouring, and pressure point relief typically only found in a hybrid mattress design. Our premium foams sport open cell technology to allow body heat to dissipate—and to keep you cool all night long. We start with 3 inches of gel swirl memory foam, followed by 2 inches of transition foam, and 7 inches of high density foam for deep compression support.