Maintenance Free RespiratorsState of the art features such as our 3M Advanced Electret Filter material which offers exceptional low breathing resistance and the 3M Cool Flow Valve that reduces heat build-up, set us apart from conventional respirators on the market. Combined with an ergonomic design for superior comfort, our wide range of patented technologies guarantee to deliver easy breathing and optimal protection against particle hazards. All products featured in this section are exempt from record keeping requirements. Solutions for Respiratory Protection | Legislation & Standards | Hazards for Respiratory Protection |