The InnerSpace 42" x 80" x 5.5" Relax Truck Mattress is the perfect solution for a comfortable night's sleep on the road. This mattress is composed of 5.5" high density polyurethane foam, providing superior comfort and support. The mattress is compression-rolled for easy shipping and installation and eliminates motion transfer between bed partners. With its superior comfort and support, this mattress is sure to provide a restful sleep. FleetPride is your First Click in Heavy Duty®.