ntilation and control condensation buildup. It comes with a heavy-duty nylon stuff sack that weighs 0.7 oz and so adds 10% to its weight. The stuff sack has a mesh base to drain water and make it easy to confirm that the bivy sack is inside.
Construction The Thermo-Lite material is a soft, waterproof, windproof fabric. It is made from four-ply non-woven polyolefin and vaporized aluminum. The fabric has a papery feel and can be ripped with a firm pull but is considerably more durable than thin Mylar. The outside has a dull silver coating. There is no seam sealing. The packaging hi
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