Those Swiss Army Sacks are nothing special but they certainly have a multitude of uses and at that price I couldn't resist sending for the second two, like you I too have been using one inside a Polish rucksack as a liner.
D.B.
D.B.
I just got the Swiss Army Stuff Sack from GOARMY after seeing it on this thread, it turns out to be the perfect size to fit inside the LK35. Given that the waterproof bag is £3.50 from GoArmy.co.uk and the LK35 is £12.50 from Military Mart, it's a (cheap) marriage made in heaven!
I wrap mine in the bivvy bag and stuff it into the bottom of the pack. Moulds much better to the size this way than with a compression sack making it an awkward beach ball shape.