I just tested this jacket during an outing in the rain in the French Pyrenees. The trail climbed sharply during 3 hours, and my body got very warm after a few minutes, and i started to sweat. Because i am a kind of furnace with 2 legs as soon as i move.
Temperature was about 10°C (50F), and i just only had a wool Tshirt next to my skin.
The jacket has proved very effective against constant rain, staying tight, and she seemed by far more breathable than my usual GoreTex jackets.
I just felt a little moisture inside the sleeves because I had bare arms close to the fabric, but it was not really troublesome.
I have lots of rain jacket, but it is the best in terms of breathability. It is not as performing as the Psiphon jacket from Arcteryx or the Patagonia Nano Air, which are pure sofshells, but remember that these jackets do not stand long under a rain that lasts for hours.
It is the best compromise to feel really dry in the rain, without the feeling of being in a sauna.
I can say it's a rain jacket with almost all the advantages of a real sofshell. And it is very light, has 3 pockets and an adjustable hood! Just a dream, an excellent choice!
Laurent, Bordeaux, France
This review was written in the old system and had content requirements that are different than reviews written today.