When building your running outfit, it's important to think about how the garments work together to provide comfort and freedom of movement. Choose functional materials that transport moisture away and help you maintain an even temperature. Adapt clothing to the weather with layers that provide the right balance between ventilation, warmth and protection. The fit should feel comfortable and follow the body's movements without rubbing. A well-thought-out running outfit allows you to focus on running and get the most out of every session.