3M Filtron High Performance Surgical Mask, Model 1838, Without Face Shield (3M) These tie-on surgical masks feature off-the-face design and special filter to help reduce fogging. They are fluid-resistant to help reduce potential exposure to blood and body fluids. Off-the-face (duckbill) design helps keep the mask away from nose and mouth for enhanced comfort and breathability. 50 masks per box. For quick delivery call: 1-786-251-7859