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The bag is a very heavy gage clear, flexible plastic with a medium size 12 volt computer fan on one end. The fan runs continuiously keeping a low flow of air through the bubble. The is leakage of air around the zipper at the bottom. Total air pressure inside of the bubble is around 2 psi or so (my guess).
I will try and get a picture posted tonight.
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...."they say I'm crazy, but it takes all of my time."
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