The KYNG PREMIUM GRADE Respirator Face Mask, NBC Filter, Hose and Bottle can be used in a variety of ways. From home projects in adding a layer of protection to your face or for your favorite HALLOWEEN Mask, the KYNG mask and filter will serve its purpose. The Military grade mask provides superior fit and the NBC filter will aid in protection against NBC variants. So have fun using the mask for your next paint ball game, for preparedness, or any other use you may find. The FILTER USED IN VARIETY OF WAYS – Charcoals are widely used to adsorb odorous or colored substances from gases or liquids MANUFACTURED: 2023. (1)5mg/L, 80-80% RH conditions. Hydrocyanic acid: not less than 50 minutes at 30L/min, 3mg/L. (2) Oil mist penetration coefficient: not more then 0.005% at 30L/min. (3) Inhalation resistance: not more than 186 pa at 30L/min. (4) Exhalation resistance: not more then 100 pa at 30L/min. (5) Visual field: total not less than 75%, binocular visual field not less than 30%. (6) Storage life: more then 10 years. (7) Produced in 2023. The mask is designed for use by military, police and civil defense and can also be used in industry. While superior in quality and thoroughly tested, this mask/filter does not guarantee protection. Use at own risk. Filter Fits any standard 40mm mask. Includes 1 premium Mask with 1 black 40mm premium grade filter. Manufactured in 2022 and is good through at least 2030 sealed. Superior NBC Filter for Emergency Preparedness, Tactical, commercial or household uses. Use the KYNG Mask and Filter in applications that may require air filtration. The KYNG Mask, Filter, Bottle and hose can aid in protection in various situations you may find yourself.