This item is used by an Eastemnet Forester as a component for the following:
View the Forester Eastemnet Recipe Index for more details.
This item can also be found in backpacks in those regions.
The area between Harwick and Langhold in The Wold has a relatively high number of creatures that drop hides: Eastemnet Boars and Wold Grazers (the latter drops between 0-2 Riddermark Hides and sometimes 1 Calanard Hide). These creatures seem to share spawn points with Spying Craban and Wold Ruffian creatures, so you'll want to kill everything.