Breathable fabric for inner tent

Tyvek?

Stumphges,
RBTR has several 7D nylons that are breathable, and Extrem Textil in Germany has one, also under 1 oz/sq/yd; but they seem to be having problems with delivery, even after I paid for the most expensive carrier. Not so with RBTR, which is based in the US.

There are some other sources, but most of what I’ve found that is very lightweight is calendered; that is, it has been through a hot roller that slightly melts the surface of one side to a shiny finish, which is not what I want for a very DWR, but very breathable tent inner.

Stumphges,
Was sure there was something at RBTR, and found a print out for a product titled 1.0 oz ROBIC XL, without calendering, breathable, and with DWR, and a diamond ripstop grid. However, it seems to be gone from the site, but found “1.0 oz Hyper D”, also without calendering, breathable, DWR and diamond ripstop, so ordered a few yards. Many of the color selections were gone, but found a suitable one. Good reviews also. It should be an adequate substitute for the Extrem Textil, which (my error) is a 20D and weighs .944 oz/sq/yd (32 gm).  The Hyper D is also a 20D, and will have to do until international shipping recovers from the pandemic, and may actually be a more robust inner tent wall material.

The RSBTR un-calenderd 1 ozy Hyper-D is one of the most breathable UL fabrics I’ve found for inner tents and clothing. I find it too breathable for a wind shirt or wind pants.

To make things interesting, what do people think about RSBTR monolite 1.0 oz “mesh” for a breathable inner tent?

1.0 uncalandered hyperD is indeed extremely breathable and I agree with Lester that it is probably too breathable for a windblock type clothing. Nice for a synthetic quilt though!

Thanks, Lester, for the feedback about the RBTR 1 oz uncalendered Hyper D.  Glad that I ordered it.

Eric, Quest Outfitters have some nylon .65 oz mosquito netting.  Quite a bit lighter than the monolite.  If the inner tent is a structural (weight bearing) part of the tent, as with most so-called ‘free standing’ tents made in the US (Example: MSR Hubba line), then it might be worth thinking about the monolite.  But if the netting is simply hung inside an outer tent, as with some of Roger Caffin’s tunnels, the lighter nylon should be OK.  As I recall, Roger used a half oz tulle, that is even lighter.

Please note that I’ve had bad luck with sub one oz polyester netting.  Every time I turned around it seemed like another hole would develop.  That is one of the great things about MYOG.  One can avoid falling prey to manufacturers’ many little cost saving measures that reduce the durability of gear.