Very few mainstream gear manufacturers produce vapor barrier clothing or gear. Western Mountaineering, the Rolls Royce of down sleeping bags, makes a vapor barrier sleeping bag liner called the Hot Sack VBL which is a very useful piece of gear for backpackers who have down sleeping bags on extended winter trips.Author: Earlylite. Feb 07, 2016 · Vapor Barrier Liner extends the temperature comfort range of your bag by 10° to 15°. By keeping your sleeping perspiration next to your body the effective warmth of your sleeping bag will be boosted 10-15 degrees. It is made of a waterproof, coated 3.5/5(3).
Oct 01, 2012 · I agree that they (vapor barrier bags) are quite uncomfortable. Try getting inside a big plastic bag (naked or with lightweight polypro on) and then in your sleeping bag. Basically, that's all a vapor barrier is. You get clammy (although warmer) and it's not a pleasant feeling IMO. Mar 12, 2009 · The advantage of the vapor barrier is that if this moisture collects inside the vapor barrier, it does not have much impact on your warmth. If it condenses or even freezed within the insulation of your sleeping bag, it will significantly reduce the insulating quality of the bag and can lead to problems staying warm.
A vapor barrier liner, or VBL, is essentially a waterproof, non-breathable sack that you place inside your sleeping bag. It blocks all of your body’s moisture from reaching the sleeping bag insulation and thus keeps the bag completely dry, no matter how many nights you sleep in it. VBLs also make the sleeping bag warmer, even though the. Dec 19, 2018 · Space blankets are not vapor barriers unless they are in bag form and seal all of your bodies moisture from evaporating. A loose square blanket tucked into your sleeping bag will not prevent perspiration from getting into your sleeping bag. Vapor barriers and radiant heat reflective material are two entirely different subjects.
Oct 05, 2011 · To put on and take off you vapour barrier suit, you have to strip naked or down to your base layer. Most people would find the suit too hot to walk in, and will only use it at night. Once the tent is up, you can crawl in your sleeping bag to undress and put the suit on.