The RS.sturmPrinz profBlack is a fail-safe solution to year-round riding. Engineered in our ASSOS Textile Laboratory from our proprietary TRITON fabric, this ultra high-performance cycling rain shell makes light work of wind and heavy rain. Featuring a temperature-sensitive membrane, TRITON can adapt to ambient temperatures, rendering the sturmPrinz profBlack less breathable in the cold and more breathable as temperatures rise, helping vent sweat and body heat from the inside to the outside. Rigorously tested on the roads around our Swiss HQ, this foul weather cycle jacket features wealth of clever features - ASSOS airVents on the sides further regulate body temperature around your core, and a parallel vent between the shoulder blades helps direct water vapor away from the body. Adjustable seals at the wrists and neck can be tightened to keep out cold, or loosened for a more relaxed fit, and sealed seams are a barrier to the worst weather. And when the rain stops and the sun makes an appearance, this high performance rain jacket for cycling is light enough to stow in a jersey pocket. In our profBlack colourway - a logo-less, capsule collection for those who want ride in anonymity, clad only in black - this game-changing cycling shell offers remarkable, pocket-sized, weather protection.