Thanks for that information. You have an excellent point.
What happens to the moisture thats left in the ocf when I get out in the morning? There has to be small percentage of moisture still migrating towards the surface, which is now beginning to freeze as I pack up camp and move to the next location, correct. So, night #2, my ocf bag is slightly frozen slab? Night#3, night #4???
Sure, I can shake out my moisture mngmt. sheet. (neat idea, by the way) But what about the pad/pads that are still laden with moisture, even at a small percentage. I'm speculating that the moisture would continue to build over time and the daily freezing cycle would render the pads useless.
I've done limited cold weather camping, but I have learned frost build up is inevitable, be it in a tent, camper, wherever. I have not tried the hammock in the winter..yet.
I think your product is cool and a good idea. More testing in real life situations will be needed. One night test at home doesn't cut it. Give it a week in normal cold conditions, slush, snow, wind, etc. without the opportunity to thaw, and then I'll be impressed.
Do have a photo of your bag rolled-up? Just curious about pack size? I know it weighs 9 lbs. I'm thinking if you could lighten it up and make it work with the hammock, you'd have a good set up.
Without an opportunity to thaw and allow moisture to escape, (i.e., packed away in a backpack), where does this moisture go? It freezes inside the ocf?
These guys figured out cold camping, a long time ago.
I apologize if I've given you the impression that I have only spent one night at a time in this system. This is surely not the case. The -4F temperature that I experienced occurred only one night in the week that I was outside. The other nights of that stay fluctuated somewhere above that, but not above 32F. My biggest concern for that week was daytime temperatures that would be above 32F and would offer, to some degree, thawing to take place. This is not what I wanted.
Now, concerning the moisture left in the bag/pad. Yes, there is some, but when you get back into that bag the next night, your body heat will thaw that moisture out, and it will continue to carry on through to escape.
The foam insulation reaches a point of equilibrium, so under those conditions there will always be a small amount of moisture left in the bag.
Jim, my mentor with 30+ years of experience with this system (much of it in the Arctic), told me that one fiber bag outlasted all the others by a few days. When he was done with that particular stay in the Arctic, he placed this fiber bag, and his foam bag (he spent equal time in both) in large plastic garbage bags when he went home. He weighed both of them, then allowed them to dry out, and weighed them again. This gave him the weight of the water that both systems had retained during that time in the Arctic.
The fiber bag had retained 8lbs of water, and the foam bag 8oz. That's quite a significant difference. He speculates that had he spent another night or 2 in the fiber bag it would have failed.
The picture of the bag that I posted is the one that I use now. I'll stuff it and take a photo and post it here.
While I agree that the Inuit people have had Winter living figured out for generations, do you have a caribou outfit, and knowledge of their techniques? I don't.