First pic: the Jerven bag is designed to be carried on the outside of your bergen as some sort of bedroll.
I used a BCUK Spyderco for scale:
Top cover:
The Jerven bag comes in a pillowcase for transport, though I've seen soldiers using it without - as it's quite a puzzle to get it back in:
The pillowcase is made of the same material as the shell. Note the aluminium coating, that reflects your body heat.
Left the pillowcase and the top cover, right the Jerven bag - full width, length folded in 3. Please note I didn't zipped the bag completely open (as a tarp), as there isn't enough room indoors
Hence only showed in bag mode.
A corner. The hole is big enough to let a pencil through.
Waterproof zips all around the outside.
The liner zipped to the shell. I put a red polo shirt in the arm opening for contrast.
View at the arm opening and a look between the shell and liner.
Liner partly zipped away from the shell, continue this and you get a separate liner and shell.
The complete package:
- Jerven bag (shell)
- Liner (either 80gr./m2 or 200gr./m2)
- 1 pair of arms
- bright orange safety flag
- webbing belt (to keep the bag up in case you use it as a 'poncho', or wear the pouch).
- pouch (for Jerven bag / shell only - though there's enough room for some small other items, like some plasters, lighter / esbit, emergency candy).
HTH