Forum Index » Editor's Roundtable » Exped Airmat Pumps Spotlite Review


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Ian B.
(IDBLOOM) - MLife

Locale: PNW
Re: Synmat UL7 and Schnozzel on 06/13/2013 22:46:04 MDT Print View

Congratulations on the birth of your son Daniel!

Daniel Pittman
(pitsy) - M

Locale: Central Texas
Thank you, kind sir. on 06/13/2013 22:57:42 MDT Print View

Thanks, I'm so stoked! He's got the biggest feet I've ever seen on a baby. Can't wait to put him in the baby-bjorn and go on some hikes next fall.

jerry adams
(retiredjerry) - MLife

Locale: Oregon and Washington
Does water really accumulate in an air matt on 06/14/2013 09:02:54 MDT Print View

Sorry - I always have to be a skeptic

Does water accumulate in an air matt that you blow by mouth?

I've been weighing my Thermarest Prolite for more than a year, maybe 50 cycles of blowing it up, and there is no increase in weight. 16.2 to 16.3 ounces with no trend.

Of course that's self inflating so I only put about two breaths into it. And any water vapor probably gets removed when it's compressed. Non self inflating mattress could be different.

Josh Brock
(needsAbath)

Locale: Outside
Re: Does water really accumulate in an air matt on 06/14/2013 12:06:09 MDT Print View

yes

Tad Englund
(bestbuilder) - F - MLife

Locale: Pacific Northwest
Re: Re: Does water really accumulate in an air matt on 06/14/2013 12:34:37 MDT Print View

Josh, could you be a little more succinct with your answer. You gave way too much unnecessary information.

Mary D
(hikinggranny) - MLife

Locale: Gateway to Columbia River Gorge
Does moisture accumulate... on 06/14/2013 12:37:45 MDT Print View

Yes. My son has a BA Clearvue, and after a couple of inflations there was lots of moisture sloshing around inside, very visible in the Clearvue!

Edited by hikinggranny on 06/14/2013 12:39:00 MDT.

Scott Musack
(ScottM) - F

Locale: Oregon
The Schnozz on 06/14/2013 13:11:59 MDT Print View

Another thumbs up for The Schnozz!

jerry adams
(retiredjerry) - MLife

Locale: Oregon and Washington
Re: Does moisture accumulate... on 06/14/2013 14:16:44 MDT Print View

Okay, maybe it's not a problem for "self inflating" matts because they only require a breath or two, and then when you compress it you remove a lot of air which will take water vapor with it also.

Gary Dunckel
(Zia-Grill-Guy) - MLife

Locale: Boulder
Schnozzel as a pack liner on 06/14/2013 15:33:18 MDT Print View

I bought an Exped Syn UL 7 last September, after my trusty Neoair delaminated on my last night in GNP. I used the Exped for a few trips in the fall, blowing it up by mouth. Later, I decided to try the Schnozzel out. Sweet way to inflate the pad. However, I've not yet used it as a pack liner, and I'm thinking I still like my cuben liner from Lawson better. The thing is, I'm not sure I want to completely empty my pack in order to get the Schnozzel out to inflate my pad. I'm also not keen on carrying it as a single-use item. So can someone please enlighten me about using it as a pack liner? Is it really no big deal to empty my pack once a day? Maybe if it's raining, I could unload the stuff inside the set up Contrail...

Stephen M
(stephenm) - MLife

Locale: A very flat place (Grrrrrrrr)
Re: Schnozzel as a pack liner on 06/14/2013 16:25:04 MDT Print View

Gary,

I have a Snozzle and use it as a pack liner all the time, no issues here here as a single use item.

A buddy often borrows one of my expeds so we use the Snozzle to inflate both pads, and I use it as a pillow also so it sees quad use :-)

After a year or so there is no sign of wear except for some dye that came off something wet between my pack and the Snozzle.

If I did puncture it then I would patch it with some duct or tenacious tape.

I have no bothers emptying my pack as everything in the Snozzle gets used at night time, I do have a separate 5 ltr dry bag with bits and Pieces in it.

Edited by stephenm on 06/14/2013 16:27:28 MDT.

Gary Dunckel
(Zia-Grill-Guy) - MLife

Locale: Boulder
Re: Schnozzel as a pack liner on 06/14/2013 16:54:00 MDT Print View

Thanks for squashing my anxieties, Stephen. Looks like I need to rethink my packing technique. For several years, I've tended to place everything in the liner except food (in its own cuben bag). Everything, including things that don't need waterproofing at all (cook pot, filtration setup,, or things that are securely protected by a freezer bag (FAK, toiletries/meds, emergency kit, etc.). If I change the way I pack, I likely can just put only the things that require protection in the Scnhozzel, which mostly will be things I'll need in the tent anyway. I can just unload that stuff inside the tent, inflate the Exped, and then return the Schnozzel to the pack. Seems like this will work. Thanks again.

Stephen M
(stephenm) - MLife

Locale: A very flat place (Grrrrrrrr)
Re: Re: Schnozzel as a pack liner on 06/14/2013 17:02:01 MDT Print View

Gary,

I only keep gear inside it that I use in the evening, I keep my tent, food and cook kit separately.

In winter I keep my puffy layers in a separate dry bag but that's only because I may use them during the day, if using my warmest sleeping bag I may stick it in a compression bag first but that's only because in the Snozzle its pain in the rear to compress.

HK Newman
(hknewman) - MLife

Locale: Western US
Re: Re: Synmat UL7 and Schnozzel on 06/15/2013 09:24:17 MDT Print View

Need to try this on my Synmat. The little pump pillow only does so much.

Greg Mihalik
(greg23) - M

Locale: Colorado
Re: Re: Does moisture accumulate... on 06/15/2013 10:00:08 MDT Print View

"Okay, maybe it's not a problem for "self inflating" matts because they only require a breath or two, and then when you compress it you remove a lot of air which will take water vapor with it also."

"Maybe" is a term relative to where you hike. If you are in a region with high humidity and wide ranging temperatures you will accumulate water whether or not you inflate or "top off" by mouth.

The moisture from the warm ambient evening air will condense as the temperatures drop and that liquid water will not flow out in the morning.

jerry adams
(retiredjerry) - MLife

Locale: Oregon and Washington
Re: Re: Re: Does moisture accumulate... on 06/15/2013 14:15:59 MDT Print View

Yeah, but I weigh my Thermarest after every trip and the outside dries, and it weighs the same. Bounces around a little, less than 0.1 ounce, but it isn't an ever heavier trend, so must be measurement noise. Less than 0.1 ounce after about 50 inflation cycles.

The moisture in the air is irrelevant. Moisture from your breath goes in, and when you compress your mattress, air goes out carrying some water vapor. Those must balance.

Greg Mihalik
(greg23) - M

Locale: Colorado
Re: Re: Re: Re: Does moisture accumulate... on 06/15/2013 14:29:23 MDT Print View

"The moisture in the air is irrelevant."

I use always use a pump. I can see the drops of water in my Exped UL accumulating as the trip progresses. Any idea how that would happen?

Edited by greg23 on 06/15/2013 14:37:46 MDT.

James Marco
(jamesdmarco) - MLife

Locale: Finger Lakes
Re: Re: Re: Re: Re: Does moisture accumulate... on 06/15/2013 15:55:50 MDT Print View

>"The moisture in the air is irrelevant."
>
>I use always use a pump. I can see the drops of water in my Exped UL accumulating >as the trip progresses. Any idea how that would happen?

Actually, moisture in the air is not irrelavent. Compressing air will force water vapour to condense. An extreme example is an air compressor. You will find these need to be bled off (releaseing condensed moisture) once or twice per day depending on how much humidiy is in the air.

Blowing up a mat, with an air pump, is about the same, except lower pressures are involved. Simply blowing it up will tend to condense any moisture inside. If humidity is high, you may very well see some as it condenses.

Temperature has a lot to do with it. On a cold night, blowing it up will also tend to warm it slightly, potentially not seeing any mosture inside it since warmer air will hold more moisture in it. If you let out the air before exiting your bag, ie, having the pad as warm as possible from body heat, it may vent the moisture as quick as you pumped it in the night before. I do this on that assumption. (It also helps to deflate the pad.)

jerry adams
(retiredjerry) - MLife

Locale: Oregon and Washington
Re: Does moisture accumulate... on 06/15/2013 16:00:09 MDT Print View

If you get moisture with pump then it's hopeless. There's more moisture in breath. With pump less moisture. I thought that's the whole reason for using a pump.

How do you get the moisture out of the mat when you get back home?

Roger Caffin
(rcaffin) - BPL Staff - MLife

Locale: Wollemi & Kosciusko NPs, Europe
Re: Re: Re: Re: Re: Re: Does moisture accumulate... on 06/15/2013 16:13:21 MDT Print View

Hi James

> Compressing air will force water vapour to condense. An extreme example is an air compressor.
Well, technically speaking, not quite.

Adiabatic compression warms the air, so that is why the windward sides of mountains are often dry. Think Atacama. Decompression cools the air and precipitates the moisture out: so the lee side of mountains is often wet. Think Amazon.

What is happening in a compressor is that the air cools in the tank after compression - then the water precipitates out. Yes, I have to drain my compressor every now and then.

Otherwise, agree.

Cheers

James Marco
(jamesdmarco) - MLife

Locale: Finger Lakes
Re: Re: Re: Re: Re: Re: Re: Does moisture accumulate... on 06/15/2013 17:29:40 MDT Print View

Yeah, just an example...I was assuming compression and same temps.

BTW: Water usually falls on the western slopes in the ADK's. As the air is forced up it cools and rains. Eastern slopes are usually dryer. But, dry is not very, sometimes. Last week I went for a swim without the canoe...