If l may. A prolific author is "politically engaged" against Russians. Widely stating they can't do anything right. The first time Russians discovered that the Fishbed could reach 21000 meters was when Egyptian pilots took some up that high for joyrides. If one misquotes a couple of sentences...
As such, there is a clear impression of disconnect. As the context is not fully provided in the first place, the answer that it's a standart high altitude suit does not form "the answer". Because, once such an idea forms in the mind, it is only natural for younger Egyptians on the web to question why this high altitude gap over Israel was not taken advantage of by developing proper tactics. It is quite possible that none of the older generations of pilots are coming forward to say they used to fly that high. Make it a special version for MiG-25s and you are set. Limit the numbers imported into country...
Because the origin is something else. Forum members will be aware of a nuclear programme in a Middle Eastern country and the pressure to mount military attacks on it. Which are somewhat handicapped by the refusal of a second Middle Eastern country taking an ambigious stance about its own possession of nuclear weapons.
As such a book written sometime ago in Israel claims the MiG-25 was combat ready in 1967 and flew reconnaissance missions taking off from Yemen. Over sensitive targets in Israel. As a prelude to bomb the nuclear reactor with MiG-25RB type jets. It was this superpower threat that forced the assembly of nuclear weapons and that country would otherwise wouldn't be the first to introduce WMDs to the region. Furthermore, this does not constitute an example to consider for 21st Century Military operations. Please notice I only report it and make no comments on the claims. The prolific author has already a book out that says the RB concept happens only because Iraqis told Russians they needed bombs with heat shields to attack Iranian cities, if one is allowed to misquote a bit more.