The RESP-O-RATOR air filter system is a dual HEPA filter "snorkel" style unit that filters the air down to 0.3 microns.  With a minimum filtering efficiency of 99.97 % the  RESP-O-RATOR is a must for woodturners, woodworkers, gardeners, and anyone else who works with dust and pollen.  Wear eye glasses?  Sporting a beard or mustache? With  RESP-O-RATOR these issues disappear.  The  RESP-O-RATOR is the low cost solution to heavy, cumbersome, inefficient, and expensive air filtering systems.  Use the  RESP-O-RATOR with your standard face shield and you're on your way to safe, healthy, and economical woodworking.