I think those mask look really cool. But, since they are technically "opera mask", is it really appropriate to wear them in Halloween?

Here’s how they look like

http://images.google.com/images?hl=en&client=firefox-a&rls=org.mozilla%3Aen-GB%3Aofficial&hs=BuC&um=1&sa=1&q=chinese+opera+mask&aq=f&oq=&aqi=g1&start=0