I'm not all that crazy about the mask, there are some things I wish they kept or changed (the left-face droop, like the original mask degraded to have by the time of H2; the fine wrinkling, a detail I don't agree with because every halloween latex mask I've ever owned never aged like that, they always got crusty and flaked off in chunks) but in terms of the history of the masks worn in the Halloween movies, it certainly is the best one since H2, I think. That droop with the "Castle stretch" makes for something very spooky. I have a pull of a "reported" stunt mask of H2, done up like H1, and displayed it with the stretch and there's something I love about the combo; it's almost like a face in death mixed with blank madness.
Shirt looks like heather gray to me.