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  1. #1
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    hybrid underquilt

    Some people have thrown around different ideas for underquilts, but I have yet to see an idea that combines two different ideas. Conceptually, it might make sense to combine the ideas of the space blanket underquilt and the fleece underquilt. The setup would be to have a thin fleece underquilt snugly fit around the bottom of the hammock with a space blanket below it. The hope would be that the space blanket would insulate warmth and the fleece would keep the condensation off the hammock/body. It seems like it could possibly work, and would be much lighter than the 22 oz down underquilts jrb sells. Is there something big I'm missing here?

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    Senior Member Cannibal's Avatar
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    Fleece is heavy and does not compress well at all. If the space blanket worked like you think it will (I don't know) the perspiration still needs to go somewhere. It will more than likely get absorbed into the fleece. That's fine from an insulation angle since fleece will still insulate effectively when wet, but the weight will just start climbing.

    Having said that, you should try it. I see you are in Denver, so you aren't going to have the same perspiration problems as the folks on the coasts. One nice thing about the arid climate here.
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    Senior Member Cannibal's Avatar
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    Oh, and welcome to the Forum!
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    Senior Member Ramblinrev's Avatar
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    Fleece has been thrown around on the forums a lot. Some have used it inside, some outside. For the most part as far as I can tell, it has pretty much been relegated to the clothes for a sleep system. Space blankets are usually used, as near as I can tell, for a vapor barrier to keep the moisture out of the main insulator.

    All that having been said.... the main premise around here seems to be... if you can think of it... give it a try... report back and let us know how you made out.
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  5. #5
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    thoughts?

    thanks for the welcome....

    The point regarding the packability of fleece is accurate, although I was maybe thinking of getting very very thin fleece to do it as I only need it for its hydro-properties. Before I actually try this though, any thoughts on maybe substituting fleece for a sheet made of a baselayer material like polypropylene?

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    Senior Member angrysparrow's Avatar
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    In regards to using a space blanket or mylar - if you haven't already seen it, take a look here at Youngblood's thread on vapor barrier use. It represents a good explanation of what many members of this forum have learned through using them. It might shed some light on your own testing.

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    Senior Member Cannibal's Avatar
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    I'm going to have to agree with angrysparrow, there is some really good info in that thread! I don't use a space blanket, so I don't really know how it will work. I was always told that it needed to be near the skin to be effective, but many people here have proved that to be inaccurate information.
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    thin fleece and sb will no doubt add some warmth, i don't think it will be as warm as a traditional down or synthetic uq though. you're not trapping as much air for one thing. also, fleece tends to not be as warm as the other insulations for the same weight, you'd probably be better off weight-wise with a thin down uq and a sb between the uq and the hammock, it would probably be alot warmer.

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    Maybe my research was inadequate, but even the lightest underquilt was about a pound whereas this hypothetical setup could be less than half a pound. My real goal in all of this is to remedy that fact that when i go in a hammock with my down sleeping bag, the bottom gets cold bc of the compression. I must admimt that I'm not very informed about underquilts. If one of the jrb quilts is used, at what temperature would it be too cold to forego any top layer?

  10. #10
    Senior Member Cannibal's Avatar
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    Yippee! Another gram weenie on the forums.

    What temp is a very tricky question for anybody to answer. What kind of hammock are you using? Does it have extra material on the edges that you could pull over you or is it a technical hammock like a BlackBird or Hennessy or Clark or, well you get what I'm saying.
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