For use with a powered respirator or compressed-air supply, the Sundstrom SR 561 respirator hood is a lightweight and Comfortable face shield that helps prevent particles and other impurities reaching the wearer's respiratory system. It's supplied with a flexible breathing tube for connection to a respirator fitted with filters relevant to your application, and conveys breathable air to the wearer in hazardous working environments. The inbuilt PETG visor provides protection against dust and debris while the continuous airflow keeps the visor demisted to maintain excellent vision.