So they have levels of different gear
Their ratings for each category are going down.
last years nitro fuel had ratings of 15k waterproofness, now this years is only rated at 10k.
and road fuel was 10k/10k last year and the year before, whereas now it is only 6k/6k.
Here is a link to this years ratings:
This might clear up a few things because when people give a rating for what they are selling it will mean a different thing for different years.
Now I think this is correct, however there might actually be some variances wtaerproofness/breathability in each level of gear.