i can only remember discussion of space blankets as suggested add-ons to HH supershelters... has anyone used a space blanket with a JRB dd poncho mod? seems like an ideal way to loosely hold a space blanket in place. how about with a JRB dd poncho mod and a down underquilt? ...and if you did use an underquilt also, did you use the space blanket over the underquilt or under the underquilt... i'm guessing above. i've got several nights of cold weather experimenting time coming up, and started thinking about that old space blanket sitting in the camping box!