The 3M M-407 is a visor helmet made of flame resistant Nomex with polyamide fire resistant face seal / shoulder protection for working in hot conditions. This helmet can be used with the TR-302 E engine unit. When connected to this motor unit it meets the nominal protection factor: 500 ( EN12941 TH3). The airflow in the main hood can be controlled for more control and comfort by means of an airflow regulator. Integrated protection of the airways, head and face. This helmet is easy and completely customizable thanks to its fully adjustable head harness. Good and easy to maintain. Weight: 1066 grams. The 3M M-407 complies with CE EN 397.