I was actually looking for an emergency WP shell when I come across this. Very light weight and very waterproof at 20k mm. Decent breath-ability rating at 15-20k, it obviously doesn't breath as well as my Schoeller jacket, but the Schoeller also isn't waterproof. Mammut sizing also run small, so a guy like me, who is in between a small and a medium can find an excellent fit in a Mammut medium. Fabric is stretchy as well, which is usually only available in a premium WP membrane. A full set of features such as ample pockets, pit zip, hem cord, and a helmet compatible hood (note: if you have a big helmet, you should size up).
There is one weird things that I notice with this jacket. When you put first put it on against your bare skin, it send a cold chill down your spin. It like the jacket is coated with a thin layer of metal or something.
It's in my backpack during day hike, climbing and camping trips. Really happy with this purchase. Excellent value.
This review was written in the old system and had content requirements that are different than reviews written today.