merely a suggestion which, hopefully, brings on a deluge of (better) ideas. Good luck.

How a jacket is designed to pull apart is just as important as how it's stitched together. The more breathable the fabric, the less features that are needed or used. Ventilation features, as much as any fabric technology, are key to a jacket's breathability. Mesh backed pockets and underarm zippers maximize air flow, as do cuffs, waists and hems that can be adjusted to open wide. I also like storm flaps (the baffle over the zipper) that close with hook-and-loop material or snaps: With these fasteners closed (but with the zipper open), air can still get into the jacket. It's a great way to get some extra ventilation, even with the hatches partially battened down.

in this description which seems to be describing the sort of jacket you are talking about, this is the term they use.
good luck