What fabric was used for the Hatters hat?

I wouldn't know the specifics of the actual material used, but I have a better quality picture that might help आप out.
All I can say about it is that I'm guessing it's the same type of material used in a normal चोटी, शीर्ष hat. Almost a jean like thickness, but different texture.
Here's a great homemade video on making the Hatter's hat here: link (And now that the movie's out आप can make it even और accurate)
And here's some और information on चोटी, शीर्ष hat material: link

For my hat I just used a regular चोटी, शीर्ष hat as the base and wrapped brown and green फीता around it to give it the colour. Then I sewed in all of the stitiching द्वारा hand and made it look और authentic.
Best of luck!!