Originally Posted by warbonnetguy
that stuff is not sil, just pu coated, i looked at some too, might work for what you're thinking about using it for, it's not breathable though. i would also like to add that in my opinion s.f. is a total ripoff, you can generally find the same stuff at owf or quest for a fraction of the price. for instance, silnylon from s.f was 10.50/yd last time i checked, little plastic cord locks are 3-4 times as expensive as most places, everything is way more there than anywhere else, and they don't give volume discounts for buying 15-20 yards like owf and quest do. they do have a large selection though, also, havent seen that heat reflective ripstop anywhere else.
I'm not so sure it's not a form of silnylon. The SF site actually says it's both pu and sil coated (which I suppose is possible) but the stuff they sent feels like silnylon. I am a bit concerned about the non-breathable part, but since I'm only using it for the shell and not the liner, I think it will be an advantage rather than a liability (i.e., wind barrier, good secondary rain protection, etc.) Still, I just might end up "stewing in my own juices", so to speak, so it is a bit of a gamble.
As for Seattle Fabrics, I can't speak to their prices beyond what I bought, since that's all I've really priced there (I already had other sources like Thru-Hiker.com from what else I needed.) They do seem to have odd things that no one else carries though, like this heat reflective ripstop. I will say that they're service is excellent. I ordered materials from them and Thru-Hiker within minutes of each other, and the SF stuff made it here 2 days ahead of the other order. That's not to say that they both didn't take care of business perfectly, since they did, but the time difference was...interesting.
By the way, there is one other site I found by accident (though this one seems a bit speculative to add to the links page just yet) when I was researching my HH purchase. It's the manufacturer of the Cuben Fiber
that Tom H. is talking about using for flys on his lightest models. I have no idea if this stuff actually lives up to the hype but apparently Tom fitted a Hyperlight with a Cuben fly as a test and the weight dropped to only 17oz from 24oz. The problem is there's virtually no info on which Cuben he used and the Cuben site is not exactly easy to navigate unless you really
know a lot about sail fabrics (which is what Cuben is.) The prices are very hard to work out and they measure everything is sailmaker's units, so it's hard to even know what to order. Still, if this stuff is half as good as what I've heard, it has real promise.