This sleeping bag liner can save your life. Even the best down or synthetic filled sleeping bag will accumulate humidity on extended expeditions in arctic conditions, reducing its insulating properties. A Vapor Barrier Liner prevents humidity from your body reaching the insulation.

During extended trips in arctic conditions, even the best down or synthetic sleeping bags can get damp and heavy from accumulated body vapor. A vapor proof liner like the VBL-Linerbag will help to preserve insulation because the insulation is not contacted by potentially freezing perspiration. VBL-Linerbag also functions as an emergency, waterproof bivy sack. Seams are waterproof. Packs into attached packsack that can be used also as internal pocket. Dry VBL-Linerbag thoroughly before stuffing or prolonged storage to prevent mold and mildew. Also check out our VBL-Socks that have become the standard on expeditions.

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