The DPM jobber pictured above and currently used as a "runaway vest" is the standard issue, ground pattern Assault Vest. This is just a nylon vest worn over body armour (if required). As I said, one doesn't actually wear this whilst in the seat - you just grab as you flee past. The downside being if you don't grab it then you leave behind all your handy kit.
The current, aircrew specific, combined armour and survival vest is made by Beaufort (I believe) and is in use by rotary and a few (very few) FW crews. In my limited experience of it I found it unpleasant and uncomfortable, a view shared by some of the FW users I've spoken to. The RW chaps have been using it for much longer and it may well be they like it and rate it but I couldn't comment on their behalf
