Ayce you mention PolarGuard 3D being better for larger areas because it's a continuous filament type insulation. How hard is it to replace in a sleeping bag that had 3D orginally but lost loft?
Also, I understand the premise of saving body heat by using the 2 person PITA Scott is describing. The weight trade off can be offset by the other partner carrying an equivelent amount of gear half the weight of the Pita IMO.
PEPPER SPRAY AIN'T BRAINS IN A CAN!