3M™ 7100172045 3M Personal Safety Division Secure Click Half Facepiece Reusable Respirators3M 142 HF 801SD Features 3M HALF FACE REUSABLE RESP W SPEAK DIAPHRAGM SM Designed with smart and intuitive features, the 3M Secure Click Half Facepiece Reusable Respirator HF 800 Series is simple, comfortable and reliable The quick, easy, one touch negative pressure push button seal check provides improved confidence in respirator fit