Using this Nella face shield is easy. First, adjust the Velcro closure to fit your head comfortably. Place the shield on your face so that it fully covers it. You can wear it for extended periods as it's lightweight and the blue headband ensures good airflow. When it comes to maintenance, simply wipe the clear plastic part with a soft, damp cloth. Avoid using harsh chemicals as they may damage the plastic. Remember, due to COVID - 19, all face shields are non - returnable, so make sure it's the right fit for you before purchasing.