The Patagonia Women's Houdini Jacket is an ultra-light and protective layer, ideal for bringing along on your trail run in unpredictable weather. With windproof fabric, the DWR finish also makes this jacket water-resistant should it start to rain. An adjustable cinch at the hood and on the waist provides a customized fit, and a slightly dropped rear hem delivers a no-gap fit. The whole jacket packs into the chest pocket, so you can easily stow it away if weather conditions improve.