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equally as VB calls for cautious thermal administration, it’s also very possible to manage the level of humidity buildup in a very non-VB sleeping method by preventing overheating. In that regard, your issue about putting on added insulation levels under your sleeping bag is nicely taken: that further layer generates an additional temperature gradient concerning you and also the insulation within the bag, producing condensation inside the bag (or maybe with your layers) extra very likely. I’ve found that, Generally, trusting the bag to maintain you heat right down to its “consolation rating” with minimal or no layers, as complicated as it may seem to be once you to start with go into a frigid tent, pays off in the end, and will often lead to a cushty evening’s snooze while not having to deal with a damp VB liner, and with little or no condensation In the bag.

I’ve also read of folks utilizing a synthetic overquilt on top of their bag to try and go the dew issue faraway from the down and into this outer layer – it looks like maybe this technique could also be placed on clothing?

> Skurka: get more info It’d do the job, but personally I like a VBL shell that is additional like a rain jacket (concerning fit and material weight) than a windshirt.

owning made use of VBLs in sleeping baggage on Most likely a 50 percent-dozen single-night time trips, I gained the impression they additional obvious heat in weather conditions among 15F and zero, but supplied a virtually imperceptible gain (if any) on evenings which were simply neat.

The final segment explained by ASTM E1643 would be the inspection from the vapor proofing process, and it involves that any harm to the vapor retarder really should be discovered and fixed before placement in the slab.

One concern is this will likely lock in an excessive amount of vapor. I Generally snooze in just a base layer and vent the bag After i get warm. apparel, and drinking water bottles are held within the bag to forestall freezing during the night time. Leaking water bottle a potential but thus far has not happened.

excellent level concerning the sublimination. even so, it’s not significant plenty of to reliably and promptly dry items out. you might be much better off protecting against issues from finding moist.

MB1 on may possibly 22, 2014 at 7:forty three pm initially Edition of VBL-bag built (however it's still to be put in correct harm’s way); silnylon internal and Pertex Endurance outer. Lofts very well enough and weighed a similar each morning just after I put in the night camped out on among my balconies as it did when I strike the sack 8 hours previously. I attempted it out on an evening I'd a flash fever from some flu-ish bug.

I've just come across this incredibly appealing write-up and discussion … I am completely new towards the thought of VBL and as such I would want to say thanks for this wonderful write-up which has absolutely aided me understand superior the rules of VBL.

What do you consider applying 2 “emergency blankets” (that shiny crinkly stuff) sewn jointly like a sleeping bag liner? Aside from the sounds challenge, at the least at first it looks as if a good idea. nevertheless I'm wondering if The reality that it displays overall body warmth will make me sweatier.

Layering. VBL’s are usually worn instantly from the pores and skin or with a base layer involving the VBL along with the skin. Personally, I favor the latter tactic, which I feel has a number of crucial Rewards. to start with, The bottom layer makes a little buffer that minimizes distress (i.e. “clamminess”) but without decreasing sensitivity to perspiration, which I want so that you can make informed thermoregulation choices. 2nd, by donning a base layer I secure my pores and skin from immediate contact with the frigid air, which might transpire or else if I needed to ventilate my “next to pores and skin” garment by unzipping it.

Potentially they are just cutting down convection. I don’t know. I've set a vapor barrier more than my sleeping bag in mild situations at altitude and promptly felt clammy. Most likely it is this disagreeable moist feeling that retains the thought of VBL from staying a lot more common. I greatly cherish the thought of climbing into my heat dry sleeping bag in frigid problems as well as considered remaining unpleasantly moist turns me off to The theory.

eventually, the all-synthetic program will are unsuccessful much too, but Possibly not ahead of I complete the trip. given that down is noticeably top-quality in its thermal efficiency, it’s debatable whether the all-synthetic method will be lighter—by way of example, I could set alongside one another a lighter weight all-down program that may be unnecessarily heat Firstly but that could continue to be satisfactory by the top.

eighteen beneath Fahrenheit or Centigrade? In either case, wow, That may be a chilly bike ride! I’m not Andrew, but for those who don’t intellect my remark: many thanks for producing my position, one particular which I've usually designed when talking about VBs with folks who don’t like the notion in the least! And that time being: no matter how breathable, with ample exercise I'm planning to sweat, even when it is extremely chilly. specially when carrying a pack. And that doesn't even rely the modest amounts of sweat which i don’t even observe, and also the insensible perspiration, i.

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