Ah good work! I'll read up on that one more now.
The inner one doesn't appear on their website, and I can't even find images of it on the web, so I guess they pushed it out for EICMA and Motorcycle Live.
Basically it's almost as skinny as a wally jacket, with a CD box-sized electronics pack that pops in a jacket pocket.
Here's the first image of it on the net! Yeah, right.
There are 5 poppers to position/lock it in the jacket.
It comes in different sizes - Small, Medium, Large IIRC. Its also longer than a passive back protector.
The one so-so bit is that the air canister is centrally mounted at the back. I would have thought away from the spine would be smarter, but hey, no airbag is even worse than that.