Oscar -20 achieves 5 out of 5
Two guys from the Danish outdoor test website outsite.org has tested Oscar -20. They especially praise the tubic construction which optimizes insulation and keeps you warm even at very low temperatures - but only when you use the collar correct :-)
Also the windbreaking membrane is working perfect as is the footbox which distributes the heat from below creating a nice "indoor climate" in the bag.
"No functionality has been sacrified to reach the relative low weight of two kilos for a -20 bag", they write - and all the technical promises about the bag are kept.