Truck, Sleep Sofa and Bunk Bed Mattresses. The Innerspace Luxury Truck Mattress is the result of a scientific approach to sleep that promotes the restful, healthful sleep you need to be at your best on the road. The 100% Verflex core is an open cell material that conforms to the contours of your body. Revolutionary, patented material firmly supports you from head-to-toe and distributes your weight evenly, eliminating the uncomfortable lumps, bumps, and pressure points that prevent you from sleeping soundly. Perfect for Trucks and RV's.