Nunatak – you mean DWR in general or from the Argon 90 specifically?
Im not too concerned with the fabric durability – just more trying to get the best balance of CFM and HH. I may just try to source some scraps of Epic fabric to test and hope to find one at higher CFM, or I have also considered getting the old wild things camo jacket (or I think the patagonia) and using some kind of fabric dye.
What Im trying to achieve is Nisleys supposed ideal of around 40CFM and greater than 300HH. My old patagonia houdini works well for dry conditions but was not as great (water resistance wise) as I would have liked for off trail use for 7 days in Alaska in Denali NP.