The Arc'teryx Alpha SV Jacket is the company's most durable GORE TEXR Pro jacket and has lead the industry since its introduction. A new GORE TEXR Pro N80p X face fabric, under development for 5 years, has a softer hand and greatly improved breathability for 2014. The Athletic e3D patterning provides room for three layers while keeping your movement as unfettered as possible. WaterTightTM pit zippers allow you to vent heat quickly when the need arises. Arguably the best hardshell in the world for serious mountaineering and winter snowsports, the Arc'teryx Alpha SV is in a class by itself.