Okay, I've failed to find exactly what I'm looking for, so I'll try and describe it here and see if anyone has any ideas before I spend a bunch of time trying to design and build one myself. It seems so simple and useful, I'm surprised I haven't found zillions of them for sale, maybe even for secret document storage while traveling abroad.
I want an ultra simple, ultra-light mesh envelope/pouch to carry on my chest. Something similar to the OMM Chest Pouch, but all mesh for breathability and light weight.
I want a simple, flat envelope to hang on either my person, or my pack harness, to put maps and small misc. during the summer for super convenient and rapid on-trail access.
I also want a slightly larger version to hold snacks, a water bottle and a fuel canister inside my outer clothing layer for winter hiking with things I don't want frozen. I currently carry a small nap-sack backwards, but it doesn't breath as well as I'd like, and the harness would probably work better if it were tuned for front carrying.
Any ideas on who might make one? Any links? Any plans available for MYOG?
Thanks in advance for your help.