Apparently the Hot Toys had is treated with flocking:
Yep.
Was looking closer at the HT hat. It seems to be made of a thin clear plastic with the "felt" kind of stuck to it. Almost as if the plastic had been sticky and the purple particles were blown onto it. Go check it out on your hats.
You can see right through it:
The inside of the crown is obviously clear, but there are spots on the underside of mine where the "felt" was sprayed on a little light and you can make out the clear plastic underneath:
Seems like a pretty good method. I mean the results in terms of texture are fantastic. It would be awesome if someone could replicate this exact technique with a correct sized brim.
That's called flocking. Seen it done for upholstery on model cars.
Yeah, flocking... I knew that. Well someone get on it!
Not sure about the color, but they have other purples.
https://www.craftflocking.com/shopping/pgm-more_information.php?id=16&=SID