Dually Custom SThe Dually Custom S was designed with specific curvature and shaping to fit dreamily in a camper van. Two layers of temperature resilient memory foam in a portable, foldable form to make room for your gear during the day with plenty of room to sprawl when the sun goes down. SIZING GUIDE FOR VANS "Its hard to overstate how comfortable the Dually is. Id stay it rivals the Purple mattress I have in my bedroom. But unlike my bedroom mattress, the Dually