Western Mountaineering HotSac Vapour Barrier Liner 6000-858
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Western Mountaineering HotSac Vapour Barrier Liner


Rocksolid Guarantee

Shop with confidence. If it’s not working out, you can return it (consumables, undergarments and swimwear excluded).

Really. If it's not up to snuff after you use it (a couple times) you can still bring it back.

It lasts longer than 30 days, but not forever. We'll be fair about it. We're all members here.

Price match guarantee

Found a better deal in Canada? Up to 30 days after purchase – we’ll match it.

If you see a lower price for this exact item advertised online, in print or in a store, give us a call at 1 (888) 847-0770.

If it’s identical, brand-new, in stock, and sold and shipped by a Canadian-based retailer, we’ll match that price.

See available Sleeping bag liners


Show Description

Made to add warmth to a sleeping bag on winter trips where the temperature is well-below zero, or to carry as emergency bivy gear. A vapour barrier stops heat loss from evaporative cooling, and prevents the accumulation of moisture in the down of your sleeping bag. On longer trips moisture accumulation can critically affect the warmth of your bag.

  • Outer fabric is lightweight ripstop nylon.
  • Reflective metal coating helps reduce radiant heat loss.
  • An elastic draw cord at the top cinches to neck to prevent convective heat loss.
  • Fits up to 198cm (6ft. 6in.).

Tech specs

Show Tech specs
Ideal for Winter and expedition camping
Material Nylon
Shape Mummy
Length 198cm
Made in USA