Ahoy, me mateys!

I got a new wool-polyester blend coat for winter. What is the best way to keep it moth-free while hanging on a hanger? It will be hanging in my closet most of the time, and the closet has no doors.

I've only owned a couple of wool items in my time, and I halfheartedly used a few cedar hanging block thingys, but the clothes got moth holes! That terrible fate cannot happen to my new beautiful coat! Noooooooo!!!!

I'm sorry I'm so clueless. Just chalk it up to being in a hot locale. (Not that the heat makes one clueless, but that I never learned how to care for wool - ha ha)