p.s. yeah, the only way the sil would work with down, would be to fully encase it in netting, so it wouldn't spill when you opened it, and the added weight of all the extra netting would defeat the purpose of going with down.
Originally Posted by Just Jeff
Agree with everything said - I'd stay away from sil for a down underquilt. I guess you could use it for the side that touches the hammock, and it would work like a VB on that side, but I don't see much advantage to it. DWR and Momentum sounds like a better plan.