The Agema Klerouchon Hippeon is made up of settled Greek and Makedonian landowners. They are well trained, almost feudalistic, heavy cavalry, and can give a good account of themselves in battle.
The Fayuum and other places made excellent spots for a heavy cavalry reserve to be raised. With a system of land grants and promises, the Ptolemaioi were able to lure many Greeks and Makedonians to settle in Aigyptos and produce a reliable heavy cavalry. They are armed with a xyston, a kopis, and are clad in a light but sturdy bronze curiass. They can be counted upon to give a good account of themselves in battle, due to the fact that they are well trained, almost feudalistic, cavalry.
Historically, the Ptolemaic heavy cavalry was very good, well able to deal with the Seleukeis and other threats. They were able to check the more numerous Seleukid cavalry at Raphia, making sure their vulnerable phalanx was not outflanked. They were in existence up until the end of the Ptolemaic kingdom and many were hired by the Romans to provide a heavy cavalry capable of fighting in the east after the absorption of Aigyptos into the Roman Empire.