Built for extreme conditions, the Summit Mountain GORE-TEX® Pro Jacket protects against snowdrifts and ice couloirs. It harnesses a three-layer GORE-TEX® Pro membrane combined with Spectra® ripstop in high-wear areas. The articulated patterning ensures full range of movement, while the draft flap features laser-cut Summit Series™ micro-perforations to help you maintain a good level of breathability.