This is the ShM-41. You may object and say "this is gp-5 you complete debil what the fцck firestar9990", but it is not the GP-5. The GP-5 is for civilian use, and the ShM-41 was for military use. The ShM-41 also came with EO-14 filters. This basic design was used all over warsaw pact countries, and was even used in china. This is the most manufactured gas mask in the entire world.