3M Secure Click Half Mask Reusable Respirator HF-800 Series is designed with smart and intuitive features 3M™ Secure Click™, HF-800 Series is simple, comfortable and reliable; helps protect workers from particulates and a wide variety of gases and vapours when used with approved 3M Secure Click filters and cartridges. Greater breathability and comfort provided by the world’s first quad flow cartridge system; push button seal check helps bolster confidence that the respirator is properly sealed to the face; speaking diaphragm is designed to help provide easier communication while you work. Confidence that filters and cartridges are installed properly provided by all new Secure Click™ connection. Low profile half mask design offers a wide field of view and compatibility with certain welding and grinding shields. Over-moulded design for easy assembly/disassembly. Advanced silicone material for increased comfort and greater durability. Available in three sizes: small, medium, and large