With a water- and wind-resistant outer fabric and lightweight, lofty synthetic insulation that maintains its heat-trapping properties even when wet, the Rab Women's Altrus Jacket is a great companion for travelling in cold, damp mountain environments. You can wear it as a standalone piece in light snow and rain, and when the weather really starts to turn its sleek profile and elastic cuffs layer seamlessly under your shell. The jacket stuffs into its own pocket, too, so you can easily clip it to your harness or backpack and never be caught without reliable, weather-ready warmth.