This weather-resistant little wonder has been on our list of essentials for nearly a decade. Perfectly minimal, the Houdini can be stuffed and put into a running short pocket, clipped to a harness or become a permanent fixture in a pack or carry-on. 100% nylon ripstop fabric blocks wind and a DWR (durable water repellent) coating protects against light precipitation. Slim fit accommodates baselayers and light midlayers. It's the emergency layer you don't know is there, until it's not. Women's Houdini Jacket