The Saito gear styles is one of the three heroic level armor sets for the Orochi class (along with the Hakata & Jubei sets) for the Samurai faction in For Honor. This set is a modified version of the rare level Nunki set, which itself is a modified version of the common level Hagane set.
Interesting to note, the triangular piece of metal on the left shoulder is not present on the right shoulder, nor is it present on the female version of this armour at all.