What mask is this lionguard wearing?
I’m pretty certain this is one of those npc sets which players cannot (yet?) get.
I recognize a few pieces of the “set” this NPC is wearing.
The Chest is from the Student armor set.
The Pants and Gloves both come from the Embroidered armor set.
As for the Mask and Shoulders, I couldn’t tell you. It’s possible they’re just for NPCs, though.