Well,
what you mean.
We are talking about the more or less last generation of Mandalorian combat armor.
The armor it self is nothing "Boba Fett specific" in fact Boba was just one of many that used and wore that armor.
Mostly used by mandalorians, and crafted in fact by mandalorians.
But it is very sought after by people that value a good armor protection combined with a excelent mobility.
In old Star Wars RPG lore it was one of the best medium armors available in the universe.
The most noticable difference of the Armors from the Old Republic time to "nowadays" modern armor design is the helmet and the reduction of plate (Hard armor) components in favor of more flexible leather or cloth type armoring.
While not really acurate,
this kind of give a rough overview of the evolution.
Here another nice example of the armor around 6000 B.B.Y.
SO no its not Boba,
yes it is a mandalorian
and yes there are many more of them