Aye Up,
That looks very similar to the Carinthia Obs bivvy (see phot).
I've owned one for about 9 years now.
Great piece of kit so long as you keep the upper material off you in heavy rain/snow and protect the under side with a mat + foliage.
Great for sleeping in but I find that I still need a (large)tarp to sit up/relax under and that also helps with the rain/snow issue.