I was poking around at Eddy Bauer (Man is that ever a store to push you into DIY to save money ) and found a really nice down jacket that used a material I haven't seen before.

The tag said it was 100% ripstop nylon, but it felt very soft and supple compared to any ripstop I've ever seen. Also, the 'grid' that defines ripstop was there, but the squares were tiny. I'd say the squares on average ripstop are in the 1/8" range, maybe slightly larger, but this stuff couldn't have been bigger than 3/64".

I'm curious if anybody knows anything about this material, and where I might acquire some.

It would make an amazing inner sleeping bag liner, or even a hammock material if it's strong enough.