The Dually Platform 50 was designed as a premium sleep upgrade for your GFC Standard Platform Camper & other sleeping areas in platform campers. SIZING GUIDE "It&&';;s hard to overstate how comfortable the Dually is. I&&';;d stay it rivals the Purple mattress I have in my bedroom. But unlike my bedroom mattress, the Dually is 100% at home in the outdoors." - Gear Junkie Review The Dually Platform 50 was designed to spec as a premium sleep upgrade for your GFC Standard Platform clamshell camper. This packable portable two person mattress is composed of 4 modular pieces that allow for maximum flexibility in your GFC platform sleep space.