Runed Breeches

Source
This item drops from the following Vrykul in Stormheim:
 * Bonespeaker Runeaxe
 * Bonespeaker Carver
 * Bonespeaker Inkbinder
 * Runeaxe Initiate
 * Bonespeaker Mystic
 * Bonespeaker Cleaver

As a quest objective
This item is an objective of Taking Inspiration.