Soft silicone facepiece. Includes a negative pressure push button seal check mechanism. Greater breathability and comfort provided by the world’s first quad flow cartridge system. Confidence that filters and cartridges are installed properly provided by all new Secure Click™ connection. Flexible System (gas & vapour and / or particulate filters). For use with 3M™ Secure Click™ filters. Face piece weight:182 g (Varies per size and model).