Chakra Armour

Chakra Armor is a unique type of armor that drains chakra from ninjutsu and genjutsu while at the same time amplifies the wearer's chakra. A black colored prototype armor was worn by Dotō Kazahana.

This being said, the armor is also seen blocking and defending against thrown projectiles which require no chakra in the least, rising the question of what exatly their armor is based on. Perhaps there is a weaker ring of chakra set around them, only strong enough to block projectiles, while the armor absorbs the blunt of the stronger ninjutsu attacks. Despite the advantage it gives the wearer, multiple wearers must be careful not to be too close to one another, as the armor is highly unstable and will explode on contact with another suit.