Whether you're running the same trail regularly or planning a new trail running adventure, you'll want to consider the location and the demands on your body while running. If you're heading to a trail where you're expecting humidity, you may opt for breathable lightweight clothing like shorts. If you're expecting light rain or cooler temperatures, a trail running jacket is a wise investment. Unlike your standard hoodie, a jacket designed for the trail can have useful features such as being lightweight and water resistant, with adjustable cords or reflective details for attracting attention.