Western Mountaineering HotSac VBL
A very useful 6 oz. to extend temperature rating of…
Price Paid: $55
A very useful 6 oz. to extend temperature rating of Western Mtneering Antelope MF by maybe 10F. I really like how it keeps the down much, much drier, as it's a total pain in the fedunza to dry a bag in the winter.
It probably could also double as a lightweight bivuoac sack. Really like the VBL concept, hope soon to try a Warmlite triple bag.
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This fire engine red vapor barrier liner is your most important companion for those technical winter trips. A VBL works by stopping heat loss from evaporative cooling. A VBL will also prevent your body vapor from degrading your insulation. This is most important during extended stays inside your bag. The Western Mountaineering Hot Sac VBL goes one step further by stopping radiant heat loss with its reflective metal coating. An elastic draw cord at the top of the Hot Sac cinches about your neck to prevent convective heat loss. This proprietary fabric is a new lightweight ripstop.
The HotSac vapor barrier liner from Western Mountaineering is an important companion for those technical winter trips.