I have some fleece stuff, and some down stuff too. both are warm, but the fleece really doesn't compress much. I guess my question would be why would you want to put the light fluffy compressible down in the dense bulky fleece? I am curious and wondering what I am missing.
Proof-ness to insulation leakage is always particular, unless explicitly engineered for a fabric-insulation combination. Some outdoor fabric suppliers are explicit about who assumes the risk for particular combinations of fabric and insulation.
"Micro-fleece" just doesn't specify the fabric as well as you might think.
Is there a single source explaining what makes some fabrics more or less porous to some insulation?
That reminds me of Danniel Tosh's stand up where he's talkin about lovin his down pillow. "Do you love goose down feathers...its like sleepin in heaven...'til that quill pokes thru the pillow case and sticks you in the eye, and is all like, 'how's that feel *****!' ooowh ow! why do you hurt so good goose?"
So, instead of a non-breathable layer on just the outside layer of a UQ, what about making the entire quilt out of 'downproof' Sil Nylon? As long as I make sure the down is completely dry before it goes in, is there any reason to avoid doing so?
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Seems to me that you may be worried about splash from underneath. You may want the regular nylon shell for UQ, then use a DWR or sil as a weathershield as needed for rainy or very foggy conditions only, IMO. This combo will also give you a gear hammock for shoes or other stuff.
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I'm with the others.
Having Sil against your body will act as a vapor barrier. You will have some condensation issues. You'll keep the down dry, and you'll be warm while in the hammock, but if your body is wet, it won't feel too good on a chilly morning.
Downproof Ripstop is a proven material, and cheaper than Sil to boot. However, if you want to protect the underside of the UQ, you can make an underquilt protector out of Sil, Cuben, Tyvek, etc. It fits loosely, allowing the quilt to breathe, protects from blowing rain and snow, and will add a few degrees to the quilt simply from wind resistance.
With regards to the fleece, I made a down filled pillow for my hammock by stitching fleece to 1.1 downproof ripstop for the top panel, and then constructing the rest of the pillow like you would any other. Any fabric that stretches is not going to be downproof, as the stretch is inherently allowed by the opening of the weave.
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