I see you favor VBL garments above a bag liner…is there a selected set up you propose Which may work greatest given my situation?
* The breathability on the bivy fabric is limited even less than the very best ailments. And In cases like this it absolutely was fully negated via the high ambient humidity — since it was very humid outside the bivy, there was no where by to the moisture inside the bivy (from perspiration) to go, so it stayed trapped inside of.
ASTM E1643 delivers significant necessities, which contractors and architects alike ought to contemplate when specifying and/or putting in underneath-slab vapor retarder units.
That’s since the physiology is fewer applicable when compared to the physics here. Air has a limited potential to contain gaseous drinking water. In other words, the thought of a greatest humidity is actual and at this kind of a degree, it is thermodynamically unfavorable for water to depart the surface of a droplet to behave as a gas. And energetically unfavorable situations tend not to, by themselves, take place In this particular universe.
If this kind of system exists, then VBL would conserve water and electrolytes, and physique warmth. certainly from Everything you report, below weighty workload this putative comments mechanism isn't enough on its own to control perspiring adequately. Potentially, however, this type of mechanism could make a big variance in the course of small effort situations like sleeping.
a VBL match. Individually, I prefer to don VBL garments, that has a number of positive aspects. initial, I'm able to utilize a lighter sleeping bag simply because I am able to snooze with all of my apparel on—a foundation layer involving my pores and skin and VBL, then all of my other levels outside the house the VBL. that has a VBL liner I'm able to only slumber in my base layer clothes; normally all of my layers would get soaked.
ought to I stick with the semi-breathable Gortex shell I've, or need to I have a shell that also passes no water vapor? Would shell levels alter if it was hotter plus much more humid, say just previously mentioned freezing during the day with sleet?
Andrew Skurka on Oct 31, 2013 at eight:45 am As long as You aren't a prolific sweater, and As long as you are taking actions to prevent too much perspiration, you need to be high-quality, especially if you're taking each individual possibility to dry out your upcoming-to-pores and skin layers, like whenever you produce a fireplace, if you get an abnormally sunny and warm day, or discover a shelter to have within out with the cold.
There is apparently a good deal of confusion and secret about VBL’s, and through this post I hope which i managed to enhance general knowledge and encourage additional widespread use by outlining the things they are, how they get the job done, and when and how to use them.
What do you consider applying 2 “unexpected emergency blankets” (that shiny crinkly stuff) sewn jointly to be a sleeping bag liner? besides the sounds problem, a minimum of at first it looks like a good idea. however I wonder if The point that it reflects body warmth is likely to make me sweatier.
Andrew Skurka on December 28, 2022 at five:36 pm I always buy the Altitude liner, mainly here because it’s not A great deal costlier or heavier than one other versions, as it provides the option to go decreased compared to the Other folks, and because there’s an uncomplicated Remedy if you don’t have to have this type of heat liner (you're taking off the gloves and clip them to the carabiner on your shoulder strap).
acylic-coated nylon, or any material having a long lasting water repellent finish). it's honest to dilemma how “breathable” such fabrics actually are, but even the poorest accomplishing will even now have some diploma of breathability, whereas VBL’s will not permit any
I don’t imagine standard shell layers would have ‘breathed’ rapid plenty of to allow the humidity to dry just before it froze to the lining.
one example is, my sleeping bag (a leading-of-the-line model rated to -5 file with high quality 850-fill down) would develop into far more damp—and fewer lofty—with Each individual very long night curled up in it. My jogging footwear and Forty under mild Strength overboots were being frozen rigid Each and every morning because of trapped foot-sweat from the days prior to. And occasionally I'd personally perspire much at night—without noticing it—that my apparel would steam when I emerged from my sleeping bag each morning.