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[pct-l] Dress Me Up & Pack Me Out - Sleeping Bag/System



 Re:Sleeping Bag/System
So I got the Marmot Hydrogen (not the Helium). Helium generates much heat 
from the fusion of 2 hydrogen atoms, so I am assuming this bag is warmer 
than the Hydrogen. The hydrogen of course has less atomic weight than 
helium. But my question is whether these Silnylon bag covers (which weigh 
about 5 oz.) actually add significant warmth to the bags. Not from thernal 
insulation, but from cutting heat loss to convective drafts. Anybody tried 
these things?