In reply to Sheffield Sam:
> was worried itwouldn't be robust enough to wear without something on top?
The outer fabric is very slippery, so not much problem with snagging or abrasion.
No need to put something on top other than a hard shell when is very windy and/or wet, though you could do with a light down/belay jacket if you are planning to be stationary for long periods of time.
With a hard shell on it also works better than a soft shell, as the double membrane effect you'd get with both shells on would make you feel you are inside a plastic bag.
May see you down in the Alps, think i'll be heading myself in the next few weeks.