The half masks of the 3M Secure Click HF 800 series are designed to effectively and comfortably protect against many common gases, vapors, and particles in industrial environments when used with the corresponding range of filters. They are available in three sizes and equipped with a speaking diaphragm to facilitate communication while working. Low breathing resistance: Easier breathing and comfort are provided by the world's first 4-fold airflow filter system. Two dual airflow filters on the respirator create four airflow paths for easier breathing. Easy handling: The new 3M Secure Click series features a quick and easy filter connection. It works as simply as a seatbelt. Just align the filter with the designated connector and snap it in until you hear a click. Then you can be sure that the filters are correctly connected. The quick and easy seal check at the push of a button helps to increase confidence in the secure fit of the mask. The speaking diaphragm is designed to facilitate communication while working. Comfort: The silicone face seal with a patented flexible nose profile is soft and provides a comfortable fit for the mask wearer. The head harness is easy to adjust and fit. The exhalation valve helps direct exhaled heat and moisture downward. This half mask series is used together with 3M Secure Click filters from the D8000 series (gas/vapor filters), D3000 (particle filters), and D7000 (particle pre-filters) against a variety of gases, vapors, and particles in accordance with EN approvals.