The headband-free RT Series hood provides high performance respiratory protection through a comfortable sport neck cuff design that helps maintain positive pressure inside the hood, helping to keep contaminants out. The patented over-the-top air delivery system delivers the air over the user™s head, down the front of the lens, and into the breathing zone. This system helps to promote curvature of the hood for a better fit to the user™s head. This unique air delivery method provides for a positive seal, minimizes fogging of the lens, minimizes dry eyes and nasal passages, and provides a reservoir of breathing air to help maintain positive pressure.