I wonder if there is such a thing as a "filter" we could put between us and say, a Thermarest valve that sould filter out most of the moisture from out breath?

Yea, just one more item to carry but in winter it could be important.

Eric
I would just use the Instaflator.
As it comes it is a lot longer than needed. I chopped a couple of feet from mine but still works well.
See here :
http://www.youtube.com/watch?v=hMUP-H2RNko&list=UU0PuLUKvG7Fxxex5BMVK4vw&index=24&feature=plcp
Franco
BTW, not all that obvious but you only need to blow 1/2 a breath (or maybe 2 5ths) to open the bag up and fill it with air. Or just turn into the wind .

Edited by Franco on 04/28/2012 18:15:01 MDT.

The filter would be a heat exchanger. You need the air going into your sleeping pad to cool down before it's forced into your pad. The instaflator Franco recommended is a good idea. If you fill it by blowing into it, you might want to let it cool for a little while to cool before pushing it into your pad.

Another way to do it would be to blow through a hose that runs through a bottle of cold water.

Leslies Pool supply has it. There is probably a store near you.

http://www.lesliespool.com/Home/Floats-Toys-and-Games/Floats-and-Lounges/76052.html

http://www.ebay.com/itm/THE-INSTAFLATOR-ONE-BREATH-PUMP-FOR-POOL-TOYS-FLOATS-/110863547617?pt=LH_DefaultDomain_0&hash=item19cffb7ce1

We carry the Instaflator, we have them in stock and ready to ship. We only charge 2.50 for shipping on the Instaflator, which is the cheapest that I have seen. Www.flyweightdesigns.com

Marc

or you can make one using a small garbage bag with a hole in the bottom, a small piece of tubing, and rubber band to secure it. i just made one and what do you know, it works.

There's also the Microburst: http://www.camp-tek.com/

Instaflator++ Simple, light, fast, cheap.

Bought one at my local Pool supply for 99 cents. It works great. 1.6 oz without the additional valve attachments. I thought - I can make this. It's really simple. But for 99 cent... Why bother.

No kidding! That's great. probably even weighs less.

Edited by MRangel on 04/30/2012 20:46:10 MDT.

I took my instaflator 1500 miles on the AT last year, and still take it camping frequently. Not even a peep out of it other than inflating like a champion. Cheap easy and reliable!

Sure, you could put a in-line filter containing a water-absorbent, but then your absorb would weigh more through the trip. At least you could throw it away between trip, or depending on absorbent type and packaging, potentially regenerate it in the oven.

But I'd suggest you let a "self-inflater" self inflate as much as possible. And only top if off with breath.

To get any moisture back out, take other opportunities to fill it with cold air but empty it when its warm. At home, in the winter, that's easy. Let it fill outside, let it warm inside and then squeeze the warm, more humid air out. But even while BPing, you could let it fill with cool air but deflate after it's been in the sun for a while and warmed up. Wash, rinse, repeat.

is the Big Agnes pump sack. 1.6 oz and can do extra duty as stuff sack, pillow, and even water carrier in a pinch. Been very happy with it. Use it selectively on trail depending on conditions, but always at home to help get any moisture out of NeoAir and other inflatable pads.