HotSac Vapor Barrier Liner
HotSac Vapor Barrier Liner

HotSac Vapor Barrier Liner

Regular price$163.95 CAD
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The Western Mountaineering Hot Sac VBL is a Vapor Barrier Liner intended as a cold weather sleeping bag accessory.
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This 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 HotSac™ VBL goes one step further by stopping radiant heat loss with its reflective metal coating. An elastic draw cord at the top of the HotSac™ cinches about your neck to prevent convective heat loss. This proprietary fabric is a new lightweight ripstop. The new HotSac™ weighs only 4.5 ounces and is light enough to carry on day trips as an emergency bivy.


  • Fits Up to 6’6″
  • 0.6 oz. Ripstop Nylon Face Fabric
  • 4.5 oz. Total Weight


  • AVG. TOTAL WEIGHT: 4.5 oz (128 g)
  • SHELL FABRIC: 10D nylon w/Non-Breathable reflective backing

Climb On Equipment offers free in-store pick up and ships within Canada & USA (some restrictions apply).

Most orders qualify for free shipping when over $99. Heavy/bulky items such as bouldering pads and faster shipping options do not qualify for free shipping. 

Work & Rescue Orders may qualify for volume discounts. Volume discount orders do not qualify for free shipping. For a more detailed information on shipping, please go to our Shipping Policy page or learn about Returns and Warranty.


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