This product is designed, manufactured, labeled, and packaged for sale to industrial and professional customers for workplace use; it is not intended for consumer sale or use M-Series are specifically designed to work together with your 3M Versaflo Powered Air Respirator and 3M Supplied Air Respirator Systems Deflector allows users to direct the airflow inside the headtop to increase comfort Fully-adjustable suspension for customized fit and weight distribution Accessory options availalble for protection to help handle the environments you encounter Visor combines good peripheral and downward vision Specific headtops can be used with a range of 3M Peltor hearing protection as well as an attachable microphone for ease of communication