@Rachel – I emailed Rab who responded that, “The Rab sleep limit is what we believe the sensible limit of the bag to be from past experience and feedback from our athletes”. This assumes you do *not* use a liner bag and/or sleep clothed.
@John S – the only bag they have rated <-12C is limited to ‘small’ size only (I’d need a regular). And having spoken to them last week, I know they’ve stopped doing all special orders and won’t make any exceptions.
re: border crossing – I know people do that but it’s often illegal. The limit on the value of goods you can bring back even for >48h out the country is C$800, which is below the cost of many of the bags in question.
@Scott Semple – spreadsheet already in place. Can’t post so I took a screenshot and uploaded it to Imgur