Of relevance to chilly temperature tenting, the utmost humidity (the air’s optimum ability to carry gaseous drinking water) decreases with decreasing temperature, causeing the risk of sweat accumulation to increase.
I just did my initial “Deep Winter” camping trip this previous March and also the temps had been 19F throughout the day and bottomed out at -17F during the night. I had been considering trying to include your idea of a VBL to aid increase my equipment and lessen my General pack weight. on the other hand, VBL clothing may be quite high-priced And more info that i’m not that proficient In terms of producing my own garments.
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There was also point out by Kate of sewing two House blankets collectively to make a sleeping bag VB liner. Andrew felt it would not be a good idea resulting from deficiency of longevity and since it might bring about sweat and trap all dampness because of not currently being breathable. Okay, I see that It could be fragile.
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Hunter corridor on October six, 2017 at 12:00 pm fantastic report, thanks for clarifying. Demystifying I ought to say… It tends to make best feeling the accommodate will be a lot better than the VBL bag. for just a next, I thought of getting a western mountaineering VersaLight bag While using the incredibly hot sack VBL for Winter season camping in Mammoth and massive Bear following snowboarding, but in hindsight, It appears a much better procedure could be to get some type of VBL fit Besides down trousers (Western mountaineering flight), down booties (feathered pals detachable) as well as a down jacket (Ghost Whisperer) and easily use that below my Z packs twenty° quilt.
Andrew Skurka on March eighteen, 2014 at five:24 pm For this kind of quick hard work and for this kind of a relatively substantial aerobic activity, I don’t feel that VBL levels make sense. I Luckily don’t should commute to work, but I do operate through the Wintertime, and for seriously chilly circumstances like which i learn that breathable but heat layers — like merino or fleece sweaters, and expedition-weight tights — perform best, probably combined with a wind-breaking layer if desired (almost certainly as part of your circumstance, not always in mine).
Theres several 0.5mm neoprene pieces available (mostly NRS hydroskins) but sadly every one of the tops have polyster vents underneath the armpits!
Just as VB requires watchful thermal administration, it’s also very feasible to handle the level of humidity buildup inside a non-VB sleeping method by preventing overheating. In that regard, your issue about donning further insulation levels below your sleeping bag is properly taken: that excess layer makes a further temperature gradient involving you and also the insulation within the bag, producing condensation Within the bag (or even in your layers) far more probably. I’ve identified that, Generally, trusting the bag to keep you heat right down to its “comfort score” with minimal or no layers, as daunting as it might appear to be when you initial get into a frigid tent, pays off ultimately, and will usually cause a cushty night’s snooze without having to take care of a moist VB liner, and with little if any condensation Within the bag.
I truly Assume MB1 was on to a thing, assuming some implies on the sides(he afterwards stated party) to allow compression, or using VB apparel or liner . one among the advantages of VB’s on The within is that it frees you up to employ any type of material on the outside, it doesn't have to breath.
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> Skurka: in order to totally embrace the VBL concept, Then you really’ll desire a water resistant zipper. But specified the small volume of moisture that passes through a zipper, I think you’d be ok with a standard zipper much too.
(The other kinds of heat reduction are conduction, convective, and radiation.) For example this issue, think about the way it feels to work up a sweat though snowshoeing up a mountain and then resting for a few minutes within the chilly, windswept summit. Brr…