In reply to Stone Muppet:
> £335 is not "less expensive" than any of the goretex I own!
There aren't too many jackets made of Gore Tex and probably none made of Gore Tex Pro for less than that are there (excluding sales)?
Yes, some Gore Tex Paclite jackets are cheaper but mountain jackets made of GTX Pro all seem to be around 500 quid now.
I've not tried this Mammut own brand material but they have a rep for making good mountain shells, if they can do that with a material that as John says seems the equal of GTX (particularly if he is comparing it with GTX PRO) but costing 2/3rds of the price, that sounds a good thing.