The Hudson Bay flatbed truck campers are designed using OEV's proprietary composite panels and aluminum extrusions. The hard walls have an R-value of 8, and the soft walls are fully insulated with an R-value of 4. Inside the Hudson Bay, a Truma furnace, Truma on-demand water heater, sink, stove, power outlets, 10-Speed fan, inside and outside showers, and large dinette with fold down secondary bunk are all standard.  This is truly the light-weight, go-anywhere, expedition-grade camper you've been looking for!