FM50T is the latest generation CBRN full face mask specifically designed to meet the latest NATO forces military mask requirements. Developed to counter the multiple CBRN threats encountered in modern war fighting, anti-terrorist and peace-keeping operations, the FM50T brings a whole new dimension to respirator design, comfort and protection. This product is controlled by the U. Either in their original form or after being incorporated into other items without first obtaining approval from the U. Government or as authorized by U. Avon Protection products are subject to the Export Administration Regulations (EAR) with Control Classification Number (ECCN) 1A004. This product is subject to International Traffic in Arms Regulations (ITAR) XIV (f)(4). See our sizing chart in our photo gallery. Greater than 36 hrs. Laboratory Protection Factory Performance (Sodium Chloride). Greater than 10,000. FM50 Mask (including twin filters). 840 grams/1.8 lbs. Visual Field Score – NIOSH CBRN APR Standard. ALL SALES ARE FINAL. Please select the correct size according to the sizing chart found in the photo gallery for this product. NOTE: For proper mask fit, faces must be clean shaven. Facial hair, sideburns, bangs and headwear may prevent a protective facepiece from forming and/or maintaining a tight-fitting seal on someone’s face. It is recommended the user be clean shaven and/or hair pulled back for sizing and using the respirator to ensure an appropriate seal. To ensure you have selected the correct size you should perform a negative pressure test. The negative pressure test can be performed by putting the mask on your face, breathe out, then block the inhalation valve and take a deep breath. For the FM50 you will need to block both inhalation valves before taking a breath. The mask should collapse to the face. If you experience a tight seal to your face then the mask has the right fit. Except in the rare case of defective product. Please contact customer service for further instruction in this instance.