Golite Quilt Stuff Sack

Sea to Summit Ultra-Sil is lightweight and easily available. Other companies like MLD make cuben fiber ones for absolute weight savings.

I don't know how long a conversation there is to be had on stuff sacks. They're just stuff sacks. And no, BPL, that's not a challenge!

I have some with eVent bottoms that let air escape while you're compressing, but remain waterproof. The rest of the material is silnylon.

"I don't know how long a conversation there is to be had on stuff sacks."

Newbie… ;-)

The kids and I rarely stuffed out GoLite quilts is stuff sacks, prefering just to stick them in our packs first and place our other gear on top of it, letting it compress as it needs.

I don't like to stuff mine that way either, if I can help it.

I use a compactor bag as my pack liner and stuff my quilt and puffy jacket & pants in it, twist, then pile the other gear on top of it.

I use a roll top stuff sack that's waterproof and lets me go with whatever volume I like. With a roll top sack, it's big enough to quickly get your quilt in there yet small when you're done. Any fixed volume sack that is small tends to also be a pain to get it in there – or at least less efficient.

IThere's no need for a breathable bottom – just give it one or two loose folds so air can hiss out, squish it down to whatever volume you want and then roll it the rest of the way. Zpacks makes the best one (medium or medium plus).
http://zpacks.com/accessories/dry_bags.shtml