Sea To Summit ApII Sleeping Bag: 5 Degree Down 25 to 5 Degree Down Bags
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Sea To Summit ApII Sleeping Bag: 5 Degree Down 25 to 5 Degree Down Bags
DESCRIPTION
Neither science nor nature has been able to produce a light-weight material that can out-insulate down. But, even with all of its warming awesomeness, down is pretty much worthless when it's wet. Even the water vapor produced by your body while you sleep can dampen your down, and after a few days on the trail, it can build up and leave you chilled. Sea To Summit added its 3D NanoShell technology to the ApII 5 Degree Down Sleeping Bag to stop both external and internal moisture from soaking your down and stealing your heat.