Secure Click™ HF-800 Series Half Facepiece Reusable RespiratorComes with a speaking diaphragm that's designed to help provide easier communication during work Replaces round bayonet connectors with the 3M Secure Click Connection which functions like a seat belt, simply align the connections and push until there is an audible 'click' Silicone face seal with patented flex joint nose bridge helps provide a softer feel for more comfort on the wearer's face Easy adjust head cradle buckles, pull straps to tighten,