I purchased the Galibier Tourmalet jacket based on comments in here and thought at £82 it was worth a punt. I wore it for the first time today in foul weather. When I say foul , at mile 26 storm Amy arrived and we rode the final 22 miles of our ride in pouring rain, proper soaking rain. At the end of the ride my bib longs were drenched and my shoes soaked. You get the picture.
I was wearing the following from Lusso; Perform 3 season base layer, Perform long sleeve thermal jersey, Perform insulated gilet. Gentle rain started at around mile 20, enough to put on my Tourmalet jacket but far from wet. I was comfortably warm and far from too hot. When I got home I tried the following to assess the jacket. I did this as soon as I got in.
I pressed a kitchen towel against the internal surfaces of the jacket. Jacket chest and back zero moisture. Arms a very slight amount of moisture. Definitely sweat. Base layer zero moisture, jersey and gilet body zero moisture. Jersey arms externally a slight amount of moisture, internally zero moisture. I think I can say with confidence the jacket more than matches Galibier's description. It's both 100% waterproof and breathable. At £82 an absolute bargain.