Is HH SS undercover down proof?

[psyculman]

I want to use my Hennessy SS undercover as the top skin of an underquilt, facing up against the hammock bottom, as it is already the right shape and fit. (why reinvent the wheel?) I plan to sew a 3" down insulation baffled thickness with a new DWR cover to the SS which will loft out under. But, does anyone have any reason why the silnylon material of the stock SS would not be down proof? Using the SS would be half the work of making a underquilt, and, I already paid for it. Just wondering. I saw something in passing about quilts, which said to NOT use silnylon with down, but, it did not say why. Does anyone know anything about this?

Thanks

[headchange4u]

Silnylon is downproof.

[kwpapke]

I want to use my Hennessy SS undercover as the top skin of an underquilt, facing up against the hammock bottom, as it is already the right shape and fit.

This is a very creative project. Keep us in the loop about how this turns out.

--Kurt

[stoikurt]

Sil is not breathable so:
1. Condensation can form inside and it will take much longer to dry.
2. After being compressed it will take longer to loft out since air won't suck in as quick.

You should probably use a non-sil dwr material for the other side of the shell.

[psyculman]

Thanks for the information, I will remember to use some breathable material on the one side, and will put up some pictures when it is finished, still waiting for more down, I have to buy a little at a time $$$$, it's an expensive obsession, but one kept alive by Hammock Forums.

[guySmiley]

I heard an interview with the Jacks R Better guys and in it they talked about down proof. From what it sounded like if you do a good job sewing and you use high quality down, you won't have a problem. One of them said that it was the low quality down that has the quills still in it and those are what want to poke through fabric and seams. The down doesn't do that.

[Rushthezeppelin]

Sil is not breathable so:
1. Condensation can form inside and it will take much longer to dry.
2. After being compressed it will take longer to loft out since air won't suck in as quick.

You should probably use a non-sil dwr material for the other side of the shell.

I think hes using it as the inner shell in which case all its acting as is a VB. I'd assume he would be using something non-treated for the outer shell so that he won't get condensation problems and it will loft up quickly.