Faultless for Gore; the fabric is Gore-Tex, which allows it to be both waterproof and breathable. In addition to this technical one, the jacket has a vent zone in the upper back, and opening pockets on the end of sleeves (air returns along the arm! Very clever and enjoyable) . A napoleon pocket allows to bring a smartphone or identity documents or keys. A closure system with one hand down the back helps tighten the bottom of the jacket, to best protect the cold!