I desynth these with Leathercraft 33 into 1 Sheep Leather with Wind Crystal. I get HQ animation more often than not, but have never gotten more than 1 sheep leather. ^^
Bought a few of these from a bazaar for 800G each. Thought I would try to desynth with wind and Lightning. HQ from Wind crystal yielded a square of Sheep Leather. HQ from Lightning crystal yielded 6 Loops of Glass Fiber. All in all I was a little disappointed in the results but they seem to be the same of regular Goblin Masks.