In reply to Nick Smith - UKC:
> What do you think about using it for a Summer mountain marathon event?
OMM introduced a minimum weight last year of 400g (total weight) for down bags (and 800g for synthetics). Not sure if they enforced it because they only announced the rules a couple of weeks before the event. The phd picalo and ultra are both sub 400g and technically banned for OMM, as were the whole range of funky ultralight bags that were advertised on the day. The rest have sensible rules instead.
Of course if you have the optional zip added to your ultra or a >400g utterly rubbish 'down' bag rated to a much higher temp, you pass kit check.
I'm hugely impressed they've managed to get a ripstop-shell and a zip (why??!) at that weight, ignoring the fact that they've managed to stick a bit of down in there too.