Since m50 is no longer available and may never be available, I was curious if anyone knew of other ultralight down-proof fabrics that would be suitable for sleeping bags/quilts. Obviously I'm thinking lighter than m90.

Info on suppliers/websites would be appreciated.

I have it on good authority that there may be something coming very soon to suit your needs, but I can't say any more.

Other than waiting on this possibility, there are no options available for MYOG that I'm aware of.

I may use Cuben on the outside of the quilt but I'd like something that feels a little nicer against the skin for the inside.

Like a month or two or six months to years? :)

If you use cuben on the outside, and a breathable material on the inside, you're going to collect condensation (a lot of it), inside your down and deloft your quilt extremely quickly.


Realistically you either need to use cuben only, or breathable only.




As far as the wait time for the aforementioned fabric, sooner rather than later, a couple of months at the outside, barring catastrophe.

From MLD:

"We now have a steady stock of M55 fabric and it is now available in the bivys and quilts for order. It is a 10d X 10d .75 oz sq/yd ( That's the final weight and includes includes DWR coating.) It has a very high quality three pass DWR coating that will last a long time. I can't start to tell you about all the many samples of small denier fabrics we tested and pursued before selecting this one - this one is really really good and only one factory we know of in the world seems to get the DWR on small d greige produced this good."

While I know that MLD doesn't sell raw materials, I would assume that Thru-Hiker will be stocking this soon as well since they source materials together.

My thoughts as well Bradford. Hoping Thru Hiker releases M55 this summer.

Ryan

Ron also has 3-layer eVent but thru-hiker doesn't carry it.

You guys may be assuming too much. Ayce mentioned not having anymore M50 for a while or ever, and I haven't seen any announcement stating that thru-hiker would be carrying M55. Ron also only has one color run of black supposedly?


Anyway, I'm not saying they will or they wont, just saying, I wouldn't bet on it, until Ron or Ayce comments on it specifically.

We should have bet on it Javan.

http://thru-hiker.com/materials/breathable.php

Ryan