Well, let me add some similar things about another units - boyars of Slavs.
(The first thing - I know little about boyars of Balkan countries).
- Their correct name is дети боярские (boyar scions).
- As far as I know, there are no evidences of such units used barding of iron parts (except trophies or examples purchased from western countries). They used leather-based barding (borrowed from steppe nomads; debatable which amount of them was also trophy or purchased) or saddle-cloth (чепрак / shabraque).
- Axe, that boyar unit is armed, resemles bardiche, used only by infantry similar to halberdiers. Boyar scions used spears, sabers, rarely maces. (They were not western naginata cavalry!
)
Also, they used both melee combat arms and composite bows. (Such a pity there is no such mechanics for mounted shooter units to use both distant and melee weapon).
Finally, that silly cloak behind backs of elite boyars - what need to use/show it during battle?