Medieval knights used shirts made from horse hair under their armor.

中世纪的骑士会在他们的盔甲下穿着马鬃制成的衬衫。

So, you will see medieval knights or Knights of the Round Table, if you're into knighting.

所以，如果你喜欢骑士， 你会看到中世纪的骑士或圆桌骑士。