PAPR Mask for Firefighters (IMAGE) Michigan Technological University Caption Portable and 3D-printed tools, like this bag valve mask (BVM) compression system, could help communities respond to future pandemic disruptions and shortages. Credit Joshua Pearce/Michigan Tech Usage Restrictions CC-BY License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.