The Inofia hybrid mattresses are designed with 7-zoned targeted support system, which will give you the best spine alignment and pressure relief. The cool cover is made of dual-layered soft knitted fabrics which are super breathable, it can help release moisture and regulate the sleeping climate. Underneath the cover, multi-layers of CertiPUR-US certified comfort foam are laid in place, creating a plush-to-sleep feel. The 7 zoned individual encased coils are positioned at the core of the mattress, conforming to the body for targeted pressure relief, offering a balanced sleep experience for many individuals. Airy mesh on the side promotes heat dissipation and independently encased coils beneath enhance airflow. Inofia double mattress is shipped rolled, compressed, and vacuum-sealed in an easy-to-handle box. It fits all frames, box springs, wood foundation, etc. even on the floor directly