The gas may be lighter than air, but the canister needed to carry the gas are not. They would also take up a lot of space in the pack, so for backpacking I don't think it would be practical.
There is still the problem with convection currents within the UQ that would make it less effective than down, which blocks the convection currents from occuring.
*Heaven best have trees, because I plan to lounge for eternity.
Good judgement is the result of experience and experience the result of bad judgement. - Mark Twain
Trail name: Radar
2014 Smoked Butt Hang Planning Thread
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