I've spent this camping season sliding of my regular Airic (always seem to be pitched on a slope), while wrapped in my really-not-warm-enough sleeping bag, with various spare clothing strewn on top for added warmth. While this arrangement is fine for the average 18 year old backpacker, I think something utilising DH's body heat may be more satisfactory. We did start out with mats pushed together and sleeping bags inter-zipped to form a double, but I just ended up in a tangled mess and was always falling in the gap as the mats slipped apart in the night. Anyone managed to come up with comfy sleeping arrangements for two?