Designed for chilly routes, this running jacket delivers strategic warmth in a lightweight package. Soft, light puffy panels on the front and advanced heat-regulating technology help manage your body's natural heat to help keep you warm in harsh weather. When the rain hits, you don't need to turn back: The water-repellent finish and adjustable hood are there for you. Plus, the mesh vent on the back provides airflow, so you can maintain a comfortable temperature and just keep going.