2020 movie, "Tenet", directed by Christopher Nolan ("Oppenheimer"), and starring John David Washington, Robert Pattinson, Elizabeth Debicki, Aaron Taylor-Johnson and Kenneth Branagh, costume designer Krista Guggia put these items together. A rare screen used prop, helmet and mask from the final battle scene set in "Stalsk 12", Two strike teams converge on the zone to recover the 3 components known as the "Algorithm". Red team enters the battle going forward in time and Blue team is in the "time inversion" aka they are traveling through time in reverse.
The helmet appears to be a version of a flight deck crew helmet. I believe the cloth portion of the helmet may have some subtle additional coloration to it to give it the appearance of age.
There is also some real dust and dirt on there, presumably from the many weeks of shooting out at Eagle Mountain, where the final battle was filmed. The style of ear protection varied amongst the costumes, so this small detail may or may not match the "hero" version you see the main stars wearing, but rest assured they are all from the same lot. Be the hit of your next halloween party, comic-con, paintball war or temporal pincer, I haven't seen any other sellers with this item!