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you bring up an exceptionally intriguing subject (to me a minimum of). I cherished Andrew’s report for numerous explanations. Long ago I study quite cautiously Stevenson’s and Other people description of how VB is effective. lots of people toss up their arms in horror for the mention of it, but Other individuals, specifically in pretty cold climes seem to swear by it. One thing early posts claimed was that the large humidity envelope designed by VB “…discouraging or even halting the production of insensible sweat.
I bought some Aquatherm three/4 leggings for summer months windsurfing while in the Southern Portuguese Atlantic, but identified them a little also cold and haven’t utilised them considering the fact that. I also have some Aquatherm wader socks. Maybe they’d be really worth dusting off to be used as VBL socks?
Also, the evaporative cooling that will take area next to your skin is A serious cooling factor, and turns into much more significant at Severe chilly temps. Any day you keep these things from taking place, through the use of a vb to maintain all of this vapor or sweat near to Your system and out of your insulation, is most likely destined to be a hotter day.
Otherwise for getting invited within one-2 situations per week by generous locals and possessing the opportunity to dry my things, I unquestionably would've shivered by more nights than I really did. The complete compromising of a number of my most crucial equipment was unstoppable Together with the procedure that I had.
If such a system exists, then VBL would preserve drinking water and electrolytes, and also human body warmth. certainly from That which you report, beneath heavy workload this putative feedback mechanism is not sufficient By itself to regulate perspiring sufficiently. Potentially, nevertheless, this type of mechanism could make a substantial change all through low energy periods like sleeping.
> Skurka: if you'd like to absolutely embrace the VBL notion, Then you definitely’ll desire a water-proof zipper. But given the negligible degree of humidity that passes by way of a zipper, I believe you’d be alright with a standard zipper too.
superior stage in regards to the sublimination. nonetheless, it’s not significant enough to reliably and swiftly dry points out. you're much better off blocking points from acquiring moist.
In general, I think the amount of humidity is trivial, and it tends to frost up on the outside of the parka and sleeping bag, rendering it easy to wipe off.
many thanks for all The good data. You’ve done a fantastic work at detailing a thing I, being a seasoned backpacker, just read about for The very first time in preparation for my to start with more info mountaineering trip. Like Many others, I far too have winter camped and seasoned dampness on my down sleeping bag and wondered why it was soaked in the morning. For my impending excursion, I will likely be sleeping in a very two man or woman, 4 year tent (nicely ventilated, but significant Even so).
Re styles, take into account trying to copy the scale of your favorite shell/raingear trousers and bottoms.
Socks are more durable considering the fact that they can’t have vents and since you can’t choose them on and off effortlessly. For me not less than, it labored fantastic to remove them at the conclusion of the working day After i arrived at camp. My liner sock typically could well be moist, but it could dry out overnight. Sure, I’m mindful that dampness possibly ended up in my sleeping bag, but All round it had been a minuscule quantity, Specially since I could ordinarily dry them out some just before about to mattress.
The a single downfall with VBL clothes is I would like to possess a whole VBL suit, which is heavier and a lot more elaborate than a bag liner. In the long term, my sleeping bag can be compromised if I'm not entirely protected with VBL’s. a whole fit would come with socks, trousers, jacket, gloves, plus a hat or balaclava.
Which While using the VBs less than wool socks and Polarguard booties, and within my 30F quilt’s foot box, were being naturally around heating(all night) even at 6F. But I didn't want to come back out with the quilt and handle that, so I just slept with moist- but quite warm- toes. After i arrived out from the VB socks future morning, they ended up moist, but not as damp as they felt, and dried rapidly. On that night, I made use of my water-proof breathable rain trousers like a faux VB, which people declare will do the job. in actual fact, SWL swears it will do the job. both my legs never place out A great deal vapor, or it worked adequately, as all my insulation was bone dry. I even weighed all the things and there was no measurable fat gain or loft decline as would be predicted from condensation.
On another subject matter, the evening I ate a dice of butter was the warmest and many cozy evening I've snow camped!