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Silnylon "Misting" and Ray Jardine
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Jim Nordby
(JimBob) - MLife

Locale: Minnesota
Silnylon "Misting" and Ray Jardine on 06/06/2006 19:48:23 MDT Print View

I saw this quote on the ray-way.com site:

We have developed a process that prevents our silicone nylon from passing a fine mist in a heavy rain. This process adds no weight, and is proprietary, meaning available only from us. Silicone nylon fabrics purchased elsewhere, even those of first quality, have a very high probability of misting-through. Misting-through can spoil an otherwise warm and dry night in stormy weather. For this reason we encourage everyone not to waste your money and sewing time making a tarp of silicone nylon purchased elsewhere.

My questions:

- has anyone else experienced this phenomenon? A couple years ago I was in
the Wind Rivers with my Tarptent
Cloudburst under _terrible_ conditions
(all night mixed rain/snow, temps around
freezing). I felt the "misting" effect
while it was raining (eventually I kept
wiping the canopy down with a towel).
The end result was a damp enough
sleeping bag that I was losing some loft.

- Is there any convincing evidence that
this is more than just condensation
being shaken off by heavy rain? Or
could it be actual micro-drops being
forced through the fabric?

- If so, does anyone have any
speculations as to what Ray's "proprietary" process is?
Maybe extra DWR or something?

Thanks,
Jim

Jeff Jackson
(Just_Jeff) - F

Locale: Colorado's Front Range
Re: Silnylon "Misting" and Ray Jardine on 06/06/2006 20:18:08 MDT Print View

I haven't experienced it directly, but there's a pretty lengthy discussion at whiteblaze if you want to search for it.

Basically it comes down to this - every waterproof material is only waterproof to a certain pressure. Above that pressure, water will find its way through. For lightweight materials like silnylon, sometimes rain can be hard enough to exceed that pressure, which results in misting.

I haven't seen any test data on this, though - other than setting up a tarp and aiming a strong hose at it. In a hammock people get very good ventilation under a tarp, and they've still reported misting during storms - and were convinced by the duration and amount of droplets that it wasn't just condensation.

If I had to guess, Jardine's treatment just increases the pressure rating for his silnylon. Finding a way to do this w/o increasing the weight has value - I wonder how it compares to Cuben or spinnaker fabric.

Duane Hall
(PKH) - M

Locale: Nova Scotia
Silnylon misting on 06/07/2006 03:11:47 MDT Print View

I've experienced this several times - each time an absolute driving, prolonged rain. However, I do not consider this to be a show stopper in any sense of the word. The mist is very fine and dispersed, and while disconcerting at first, insufficient to wet anything in the shelter. I use a down bag with a good quality water resistant fabric (Marmot Hydrogen), and my bag has never been wet. At worst, objects in the shelter might have a slightly clammy feeling after a long, hard rainstorm. The bottom line for me is, I am still using silnylon shelters, either ID tarps, or Henry Shires' fine products. I have no fear of getting soaked because of moisture coming through the fabric.

Cheers

Chris Nott
(ChrisN) - F

Locale: Canada west coast
Re: Silnylon "Misting" and Ray Jardine on 06/07/2006 10:39:47 MDT Print View

Silnylon has a relatively low waterproofness (or whatever the term is). Simple pressure can push moisture thru the fabric and I've encountered this with silnylon stuff sacks. The pressure from a heavy rain would be sufficient to push moisture thru the fabric. HOWEVER, I think mist caused by the impact of rain and wind dislodging condensation on the inside of the fabric probably far outweighs the amount of misting from the rain itself. I spent a very windy and rainy night in a traditional 2-skin tent with a urethane coated fly last summer and experienced considerable misting which could have only come from condensation.

I would guess that Ray uses calendared fabric (if you can calendar silnylon without removing the silicone).

John Chan
(ouroboros)
silnylon waterproofness. on 06/07/2006 10:49:28 MDT Print View

Silnylon isn't waterproof in the classic sense. The silicon impregnation of the ripstop nylon is like a permanent DWR that breaks the surface tension of water. This improves the water repellancy of the fabric but high-velocity water droplets can defeat this and you get your "misting". I experienced "misting" under a spinnaker tarp last year so I would guess that this is true of all silicon-impregnated fabrics... including Epic.

eric levine
(ericl) - F

Locale: Northern Colorado
silnylon and misting on 06/07/2006 11:52:29 MDT Print View

Jim Wood talks about waterproofness on his website, with some numbers.

Myself, backpacking/hiking in the rockies, it's far from my major concern ;)

http://jwbasecamp.com/Articles/DryGear/index.html

Dale Wambaugh
(dwambaugh) - MLife

Locale: Pacific Northwest
Re: Silnylon "Misting" and Ray Jardine on 06/07/2006 11:57:24 MDT Print View

I keep a low density polyethylene 45 gallon garbage bag in my kit for times like this. They are nearly four feet tall, so you can use them for an emergency half-bivy, a raincoat, or sliced open, you have a small tarp or ground cloth-- at 1.4oz. It allows you to cover your bag from falling condensation, a night under a tree, or covering the bottom of your bag from the stream that magically appeared in your tent.

Edited by dwambaugh on 06/07/2006 12:12:11 MDT.

Vick Hines
(vickrhines) - F

Locale: Central Texas
Re: Re: Silnylon "Misting" and Ray Jardine on 06/07/2006 19:39:00 MDT Print View

I love silnylon, but I've gravitated back to to lightweight polyurethane coated nylon because I don't like the misting. I have several silnylon tarps which I like for a variety of design reasons but what I really USE is my cape/tarp that goes over the hammock and serves as raingear.

With that said, I used a silnylon tarp with down quilt on the AT in '03, the monsoon year. I didn't die or get wet. But feeling that mist coming through is disconcerting. I plan to do the AT again in '07 and will use a PU coated cape this time.

John Carter
(jcarter1)

Locale: Pacific Northwest
Re: Re: Re: Silnylon "Misting" and Ray Jardine on 06/08/2006 00:04:26 MDT Print View

Anyone know if the heavier silnylon used in the GoLite Hex 3 has the same misting issues, or does the thicker fabrix alleviate this?

Jeff Jackson
(Just_Jeff) - F

Locale: Colorado's Front Range
Re: Re: Re: Re: Silnylon "Misting" and Ray Jardine on 06/08/2006 06:55:43 MDT Print View

I was in a friend's Hex 3 in a very windy snowstorm, and we could see the moisture coming down from the walls. I couldn't say how much was condensation, but there was probably too much moisture for it to all be condensation.

These winds were gusting to over 100mph and the Hex withstood it for several hours...I was very impressed with its performance that night.

Edited by Just_Jeff on 06/08/2006 06:56:36 MDT.

David Olsen
(oware)

Locale: Steptoe Butte
fabrics under pressure of water on 06/08/2006 11:34:04 MDT Print View

In my own experiments I have found, in order
of waterproofness under pressure, (starting
with the most waterproof )

200 denier nylon with 3 oz urethane coating
(used in dry bags as it is a thick enough coating
to be heat sealable)

200 denier nylon with 1.5 oz coating urethane
total weight about 6.5 oz per yard square

70 denier nylon with 1 oz coating urethane
total weight 3 oz per yard square

70 denier nylon with Goretex XCR 2 layer or
Paclite 2.5 layer laminate 2.1 oz per yard square

30 denier nylon with .2 oz silicone coating
total weight 1.3 oz per yard square

30 denier nylon with .2 oz blended silicone
and urethane coating
total weight 1.35 oz per yard square

Spinnaker "pro"

70 denier nylon with .25 oz urethane coating
total weight 2.25 oz per yard square

Standard "white" Spinnaker

The fabrics with over an ounce of coating
withstand high pressure. The others
will have some drops form under high pressure
but are very waterproof under average rain
conditions. I have yet to hear from someone
who speaks of this "misting" in the tarps
and fabric I have sold. (Not that it doesn't
happen, but I don't think it is common)

I don't believe Ray can do better
without increasing the weight of the fabric
with more coating.
Note that spinnaker cloth
is calendared.
The 30d silicone coated fabrics have
3 times the tear strength of the heavier 70d urethane fabrics at half the weight .

You could double up on the silnylon fabric for the weight gain would need to incur to switch to a more waterproof urethane coating.

Jim Wood
(jwood)
Re: Silnylon "Misting" and Ray Jardine on 06/08/2006 13:37:01 MDT Print View

As others have noted, misting does sometimes occur in hard rain storms with standard 1.3 oz silnylon (which when new, is only waterproof to 1-2 PSI). If it bothers you, the good news is that it's fairly easy to eliminate by applying a thin coat of the slurry discussed in this article to your tarp or canopy of your shelter.

Rather than using the 1:3 mix (sealant to mineral spirits) for silnylon floors that's discussed in the article, a more diluted 1:5 mix should work well for canopies while adding a bit less weight. The treated shelter, depending on size, will probably gain only an ounce or two.

It's probably also best (if practical) to apply the mix to the underside of the canopy since the dried treatment will reduce the slipperiness of the silnylon fabric a bit. There's an advantage to having the outside silnylon surface as slippery as possible since it helps accumulating snow slide off onto the ground.

Also note that this treatment only works for silicone impregnated fabrics and will not bond with PU coated surfaces.

Edited by jwood on 06/08/2006 13:43:37 MDT.

David Olsen
(oware)

Locale: Steptoe Butte
silnylon is hot calendared too on 06/08/2006 15:37:28 MDT Print View

Oh, and silnylon from the more common US
source is hot calendared.

Ben Wald
(benwald) - F
British silnylon more waterproof? on 06/08/2006 20:22:09 MDT Print View

Jim Woods' article mentions that PU tent floors usually have a hydrostatic head in the range 5,000 mm to 10,000 mm (higher is better/more waterproof). The article goes on to say that 30D silnylon generally has a much lower hydrostatic head, between 700 mm and 1,400 mm. Consequently silnylon tent floors can leak under (body) pressure. The British tent manufacturer Lightwave claims that the silnylon used in the canopy of the t0 ultra has a hydrostatic head of 5,000 mm. If that's correct it would solve the misting problem. Oddly enough, the floor is PU, also rated to 5,000 mm.

Edited by benwald on 06/08/2006 20:24:51 MDT.

David Olsen
(oware)

Locale: Steptoe Butte
nylon coatings on 06/09/2006 10:09:54 MDT Print View

I will likely have some 70d ripstop with a .5
ounce coating of silicone and urethane blend
soon. This should make a bit more durable floors
than 30d silnylon at less of a weight penalty
than heavycoat 70d urethane. It shouldn't
be as slippery as pure silicone coatings either.

David Olsen
(oware)

Locale: Steptoe Butte
Re: Re: Silnylon "Misting" and Ray Jardine on 06/09/2006 10:18:13 MDT Print View

It would be great to see any sources for PSI of
coatings. I can only compare them one to
another. Perhaps there is a more ideal
amount of coatings or blend of coatings.
Where did you get your data Jim?

John Brown
(johnbrown2005) - F

Locale: Portland, OR
silnylon as bivy floor on 06/09/2006 13:25:58 MDT Print View

Reading this thread has got me wondering about silnylon as a bivy bottom/floor. I'm about to sew one, and wondered what other people's experience is. given that oware makes em, and shires tarptent floors are silnylon, I figured it'd be ok, but now I'm wondering if I need to worry about water soaking up through it. what are you all's experience w/ that?

mark henley
(flash582) - F
Re: silnylon as bivy floor on 06/09/2006 13:36:18 MDT Print View

Did you want your floor to be completely waterproof or water resistant?

I made a Bivy out of DWR nylon for the top and Silnylon for the bottom. I use mine in concuntion with a poncho tarp to keep the bulk of the rain off .... Unless you have a river running under your tarp or you're laying in a puddle, you should be ok.

John Brown
(johnbrown2005) - F

Locale: Portland, OR
Re: Re: silnylon as bivy floor on 06/09/2006 13:38:05 MDT Print View

Yeah, I was planning to use it w/ a tarp, not as sole shelter in serious rain. Although I suppose that doesn't necessarily mean there won't be a river running under... :-)

Edited by johnbrown2005 on 06/09/2006 13:38:42 MDT.

Jim Wood
(jwood)
Re: Re: Re: Silnylon "Misting" and Ray Jardine on 06/09/2006 13:49:27 MDT Print View

David -

My data regarding the water resistance of silnylon was collected from a variety of sources. I should note, however, that silnylon is kind of an odd product about which not very much info is actually published, at least on the Internet.

One of the few companies that does make some specs available is Performance Textiles (http://perftex.com). Their "Soar Coat" product is pretty much a "standard" 30 / 40 denier silnylon. I ended up calling the company to discuss water resistance, since that particular spec is not listed on their website.

Another source, "Ayce" at thru-hiker.com, probably knows at least as much about silnylon as anyone else in the backpacking world and has confirmed the 1-2 PSI rating for "standard" silnylon. If you search his forum, you'll find the issue discussed in multiple threads.

As a further check, I built my own crude hydrostatic head testing rig that consisted mostly of a 10 foot section of PVC pipe to which I affixed silnylon samples (at the bottom when the pipe was oriented vertically). I'd slowly fill the pipe with water until the fabric sample began leaking, then would measure the height of the water column that produced the leakage. I found that the 1-2 PSI rating was about right for my silnylon samples when new, but also observed that the water resistance of silnylon can deteriorate after it's used for a while.

It's worth noting (as you already know, but others may not) that some newer 30d fabrics are now being treated with both silicone and polyurethane. The Sea to Summit Ultra Sil dry bags and the rain flys of lightweight tents like the MSR Hubba series are examples of applications using this dual-coated fabric.

The double coating adds weight, but improves water resistance to a degree (but not a lot in some cases if it's very thin). It also makes it possible to heat-tape the PU-coated side of the fabric—not possible with straight silnylon since it's so slippery. It further improves fire retardency enough that tents made from the fabric can be sold in those jurisdictions (seven states + Canada at last check) whose laws make most silnylon tents technically illegal because silnylon doesn't measure up to their tougher fire retardency standards. As most backpackers know, standard silnylon will burn if exposed directly to a flame.

So far, I've tested only a single sample of this dual-coated fabric (the new Ultra Sil dry bag) and was not very impressed. You can see the leakage problem here.

Edited by jwood on 06/09/2006 15:49:12 MDT.

Donald Johnston
(photonstove) - MLife
Re: Silnylon "Misting" and Ray Jardine on 06/15/2006 19:13:27 MDT Print View

I can't say the misting described can't happen perhaps with some defective silnylon but I haven't seen it and I don't believe it..... I consider the claims to be fear mongering.

Condensation being knocked down by impact on the farbic from hard rain is possible in some weather conditions with the way the shelter is pitched being a factor. Try it some time. When there is a lot of condensation in the morning go out and smack the out side of the shelter and see what happens inside.

I have spent nights in the rain in tents with conventional urathane coated nylon and silnylon. There is no difference. Rain = 100% humidity to begin with. Rain and fog many times go together. In hard rain the air feels very humid even if you are in say a carport where no misting through the roof is going to occur. When it rains hard the drops hit the ground hard and bounce/splash back up. This brakes up the larger drops and creates some mist. Now put your self in a small shelter out in it. How are you going to have dryer more mist free air inside the shelter than is surounding it? Water vapor moves from wetter air to dryer air very quickly. You can see the mist in the air with the beam of a flashlight light both in the carport and in the shelter out in the rain.

Enjoy the experiance of closeness with nature being out in a small shelter in the rain.

Ron Bell
(mountainlaureldesigns) - F - M

Locale: USA
misting falacy on 06/16/2006 12:36:53 MDT Print View

Hi All, I agree with Dave at Oware. I've never had a customer say anything about misting either. Heavy condensation can be bounced off the underside of any tarp, and rarely happens. I do have a limited amount of special 40D (not the 1.35 standard 30D) heavy double coated (impregnated) silnylon in med green that is for all practical purposes is completly waterproof. I use it for tougher packs, pack backs, tent floors, super tough stuff sacks (dry bags) and kids gear. It weighs 2oz sq/yd. Fabric weight is about 1.4 and the coating is about .6. My real life test was to stand on a wet cloth and try to push water through the material to a dry receiver underneath. My ball park spec is over 190lbs sq/in as it did not push through when standing sand grinding my heel. It's about twice as strong as the reg 1.35 silnylon. (I have seen some 2nd's 1.35 silnylon that was too thin for tarps. A good general test is weigh. If it is below about 1.25 sq/yd then most likely the coating is too thin. Most 2nds sold by the DYI folks, like thru-hiker.com are solid and you need not woryy about inferior water resistance.) I will sell some of the special weight 40d silnylon for $10p/yd, 3yd min. plus shipping. Contact me. -Ron

Vick Hines
(vickrhines) - F

Locale: Central Texas
Re: misting falacy on 06/18/2006 19:30:49 MDT Print View

Hate to get into this argument, but misting is as real as dirt. That's just the plain truth. I've seen it, and experienced it first hand on very many occasions, and I know the difference between condensation being knocked off and water from the outside spraying in. As to the test of standing on a piece of silnylon in a puddle to test water resistance. I use it for the bottom of my bivy and for groundsheets and find it reasonably water resistant for that. However, if you make a water bag of the stuff and fill it more than 9 or 10 inches deep, it will weep. Not condensation either, bald-faced leakage. That is true of good first quality 1.35, 30D. So fess up. The stuff is good, and the misting is not significant enough to be a real safety problem (probably), but it dern well happens. I do not plan to reply to any responses to this post. You can argue all you want. I know what I know.

Kenneth Puentes
(pue397) - F

Locale: Southern California
Silicone aerosol? on 07/27/2008 09:20:49 MDT Print View

deleted - wrong posting

Edited by pue397 on 07/27/2008 09:23:58 MDT.

Don Selesky
(backslacker) - M
Re: misting falacy on 07/28/2008 10:57:19 MDT Print View

"I agree with Dave at Oware. I've never had a customer say anything about misting either."

Well, I guess you have now. :-)

I have the Hex Hammock Tarp in Spectralite, which I used over a JRB hammock last month in Vermont. We got caught in the mother of all rainstorms, the kind that, had I been driving, I would have pulled off the road because I couldn't see the road anymore. Fortunately, we had gotten off the trail and set up just prior to the rain starting, and I was lying back in the hammock when the skys really opened up. The tarp was maybe 1.5 to 2 feet over my head, and it was definitely misting through the tarp so that the spray kept landing on my face. Since we had just set up, I doubt it was from condensation under the tarp, and it continued for the three or more hours of the downpour.

Understand that this is an observation, not a complaint. I basically filed it under "yeah, SilNylon tarps do that." I'm not suggesting that torrents of rain poured through, turning the hammock into a bathtub; it was just a bit of misting. More importantly, when I go out again I'm going to take the 6.5 ounce Spectralite tarp rather than a 1 pound plus PU coated tarp, and just deal with whatever misting occurs. I'll live, although I *may* just try to add a bit more of a silicone coating on the underside of the tarp.

8/5/08:

Okay, I'm reevaluating the above statement. I think that if I expect severe rain I *will* take the PU-coated tarp, for a few extra ounces, and enjoy a mist-free evening; if it's going to be drier, then the SpectraLight tarp goes with me for the lighter weight. I guess as I get older I get crankier about comfort, and the inevitable trade-offs between comfort and weight. For me, weight isn't everything, although it's obviously still important. But if I really need something, ...

Edited by backslacker on 08/05/2008 14:22:51 MDT.

Linsey Budden
(lollygag)

Locale: pugetropolis
"Silnylon "Misting" and Ray Jardine" on 08/05/2008 13:29:06 MDT Print View

Both my silnylon (seconds) MYOG poncho tarps, my first silnylon (1sts) MYOG tarp/Wheelen lean-to and my GG Spinntwinn have misted through. My tarp made of Ray-Way silnylon has NEVER misted through so I firmly believe in Mr. Jardines claim that his proprietary silnylon coating eliminates misting. Also the Ray-Way silnylon has a slightly crinklier feel.

Edited by lollygag on 08/05/2008 13:32:29 MDT.

Vick Hines
(vickrhines) - F

Locale: Central Texas
Re: "Silnylon "Misting" and Ray Jardine" on 08/05/2008 16:04:52 MDT Print View

Not all silnylon is created equal. Simple silicone impregnated fabric will seap under a small head of water (6 to 8 inches) and raindrops will sploot a light spray through it because they focus a very high head on a small area. This is in addition to their knocking condensate off the inside. Double coated silnylon which goes through the process twice - once on each side - is functionally waterproof and will not mist. Ditto for fabric that has a film of polyurethane over the silnylon. However, the latter has all the disadvantages of polyurethane and tends to delaminate.

Don Selesky
(backslacker) - M
Re: Re: "Silnylon "Misting" and Ray Jardine" on 08/05/2008 17:02:05 MDT Print View

I intend to try to add more silicon on the underside of the tarp to gain a better seal against water penetration. It will add a few ounces, but still be much lighter than straight PU-coated tarps.

Edited by backslacker on 08/06/2008 04:06:55 MDT.

David Olsen
(oware)

Locale: Steptoe Butte
Re: Re: "Silnylon "Misting" and Ray Jardine" on 08/05/2008 18:38:08 MDT Print View

And some silnylon is a blend with a touch of urethane in the
mixture which can be applied to one of both sides and in lighter or heavier amounts.

There is no free lunch, although some are tastier than others.

Don Selesky
(backslacker) - M
Re: Re: Re: "Silnylon "Misting" and Ray Jardine" on 08/05/2008 20:07:52 MDT Print View

I'm assuming that the MLD SpectraLight [Cuben] is silicon coated only - no PU.

While there may no free lunch, sometimes you can season to taste. :-)

Edited by backslacker on 08/06/2008 04:06:19 MDT.

Eric Blumensaadt
(Danepacker) - MLife

Locale: Mojave Desert
PacLite Gore-Tex on 08/05/2008 21:17:53 MDT Print View

Would GTX PacLite laminate be heavier than medium weight PU coating?

If so the expense may be worth it to avoid the misting problems in Silnylon fabrics.
But then it's likely not going to pass flame retardent tests.

Jim Woods 5:1 ratio of mineral spirits to silicon applied with a VERY low nap roller may just be the answer for those who love their tent but hate its misting.

Eric

Edited by Danepacker on 08/05/2008 21:20:17 MDT.

John G
(JohnG10) - F

Locale: Mid-Atlantic via Upstate NY
Re: Re: "Silnylon "Misting" and Ray Jardine" on 08/06/2008 05:48:45 MDT Print View

How can you tell if the silnylon is single or double coated ? Is the standard 1.1 (1.35 after coating) fabric sold by thru-hiker, or OWFINC double coated ?

Also, does anyone know where to get 20-40 denier ripstop with silicone coating on the outside, but a PU coating on the inside ?

Don Selesky
(backslacker) - M
Re: Re: Re: "Silnylon "Misting" and Ray Jardine" on 08/06/2008 06:39:04 MDT Print View

No idea whether it's single or double coated, only that it's .65 SpectraLight (Cuben), and I assume that there's no PU coating on it.

Vick Hines
(vickrhines) - F

Locale: Central Texas
Re: Re: Re: Re: "Silnylon "Misting" and Ray Jardine" on 08/06/2008 15:54:09 MDT Print View

JohnG.
The only way to tell about double coating is what the manufacturer claims. American Home and Habitat (americanhomeandhabitat.com) is one source. It sometimes (sporadically) shows up at other fabric sources.

None of this applies to Cuben which is a fiber-reinforced Mylar (polyester) film.

David Olsen
(oware)

Locale: Steptoe Butte
Re: PacLite Gore-Tex on 08/06/2008 20:27:22 MDT Print View

I say again, there is no free lunch. A lightweight coating,
say .3 oz, whether silicone or urethane is going to have similar
water resistance under pressure. If you increase the coating
to .5 oz or 1 oz or 1.5 oz or 2 oz you will get correspondingly more resistance under pressure as well as
more weight.

Paclite in its lightest versions is similar to a 1.9 oz
nylon with a .5 oz coatings or urethane or silicone.

The advantage to silicone is its durability in long term
damp conditions and that fact it increases the tear
strength of the fabric it is applied to.

Again I say that you could carry two silicone tarps for
the weight of 1 urethane tarp. Double them up and you
would have no misting issues at all. Or maybe carry
a bivy sack instead and get a ground sheet and bug and
wind protection too.

Don Selesky
(backslacker) - M
Re: Re: PacLite Gore-Tex on 08/07/2008 04:08:36 MDT Print View

"I say again, there is no free lunch."

Unfortunately, too true.


"Again I say that you could carry two silicone tarps for
the weight of 1 urethane tarp. Double them up and you
would have no misting issues at all. Or maybe carry
a bivy sack instead and get a ground sheet and bug and
wind protection too."

I would assume that adding extra silicone to one tarp is lighter, but functionally equivalent, to two normal silicone tarps.

I think what I've come to is, I'd rather carry a few extra ounces and not have misting spray over my face at night. As long as the ounces don't start adding up to pounds...

Damn, I *hate* trade-offs. :-)

Scott Bentz
(scottbentz) - MLife

Locale: Southern California
Misting: Myth or Fact on 08/08/2008 13:17:45 MDT Print View

This discussion has been interesting to me. I just got back from 2 weeks at Philmont Scout Ranch, New Mexico. 2 of us had Gossamer Gear "The One" tents with spinnaker cloth. It rained six days or nights. I had light condensation inside the tent on the wet days. Very little to none on the dry days. One night I distinctly remember feeling a misting in the tent. It had rained that day and the tent was wet. A light layer of condensation had formed on the inside of the tent. That was a first for me in that tent. The misting was also noticed by the other guy with The One. It was only noticed one night even though we had other nights with substantial rain with large puddles around the camp.

The misting was not enough to wet or saturate a bag. In fact. it was almost so little I thought I was imagining it. Is it real or is it Memorex? I don't know.

Don Selesky
(backslacker) - M
Re: Misting: Myth or Fact on 08/08/2008 13:29:52 MDT Print View

"It was only noticed one night even though we had other nights with substantial rain with large puddles around the camp."

That was in a low humidity environment. It gets more interesting out East where the humidity often hovers in the 90s.

The misting sounds more like fabric penetration than condensation being consistently knocked off (not that they're mutually exclusive).