When the weather forecast shows a 50/50 chance of rain and you're planning to crush some trail miles, the Outdoor Research Helium UL Jacket is your secret weapon against unpredictable skies. This ultralight rain jacket weighs just 159g and stuffs into its own pocket, making it the perfect insurance policy for trail runners, hikers, and peak baggers who refuse to let a few storm clouds derail their adventure. Built with Toray Dermizax 2.75-layer waterproof protection, it delivers serious weather defense without the bulk, while YKK Aquaguard zippers keep every drop out when the heavens open up. Whether you're pushing the pace on a mountain ridge or navigating a surprise downpour during your morning commute, this women's ultralight jacket disappears into your pack until Mother Nature decides to test your resolve, then springs into action to keep you dry, comfortable, and moving fast.