Aye Up Daffy,
I am only aware of two breathable material Austrian Army jackets (out-ers not inn-ers) - the '97 pattern and the KA03 pattern - (there may be more).
The '97 is a lovely browney-olive; it is cut in a sort of 'casual' style with two lower slash pockets; the outer material is nice and soft and fairly rustle free; it does have a non remove-able nylon liner; it has two very small epaulettes on the shoulder and a non-volume adjustable hood; it has an internal snow valance and a waterproof protective strip along the inside of the bottom hem. It was issued to the alpine troops.
The KA03 is a stoney-olive (the Austrians call it stein-grau - stone grey), it is cut in a similar style to the '97 but has no epaulettes; it is unlined and the material is of a slightly stiffer construction; it has a volume adjustable hood. This jacket is still (general) issue and can be bought surplus and/or brand new.
I have used both for several years and whilst the '97 is slightly more comfortable (and casual as it 'hangs' better than the '03 if fashion is an issue to you lol) the '03 material is less prone to scags and scuffs from such things as hawthorn, gorse, bramble and the chaffing points from rucksack backs, shoulder and waist belts etc. (I've also used the matching over-trousers and the finer fibres of the material really 'pull' easily). The '03 has suffered almost no scagging and only minor rucksack damage after regular prolonged use.
After appropriate cleaning and reproofing neither jacket has let me down in the heaviest of downpours but I did feel slightly 'clammy-er' in the '97 with its liner. (it is also slightly more difficult to wash due to the fixed lining).
The '03 by comparison has always felt 'bomb proof'.
In both cases I am very careful not to get the jackets anywhere near naked flames or sparks.
If you do want synthetic material, on balance if faced with a choice I would opt for the '03.
Hope this is of use to you.
