Sorry for the late reply. Not that active here anymore. Not this specific face design. But in general this is just an crossover between the homestuck character Gamzee with the Matryoshka universe/thing from Vocaloid.
Actually I didn't use any materials for the hoodie. The hoodie is a plain simple black hoodie with a zipper. What really transforms this hoodie is the matryoshka smile and eyes on the sides. But this hoodie is made out of cotton, so hope this helps you!.
My friend made it for me. There are a bunch of various designs since it's an AU and people have their own interpretation of how the design should be. So my friend just made her own version which I used.
It's just a simple black cotton hoodie. You can easily buy one and put the matryoshka smily and eyes on the sides. That's what really makes the difference. I would have sewn this, but since I planned it 1 week before a convention I had to act quick.
Do note the hoodie itself is just a normal black hoodie with nothing on it. My Matryoshkastuck cosplay was something i decided on 2 weeks before the con started so I only bought the fabric for the hoods smile and eyes. As for what fabric that is made of i can't remember but it wasn't anything thin. It was a bit thick. almost paper like
Praise from someone as talented as you, that's a big compliment for me, thank you! And obviously you're really awesome yourself, loved the Disney act at SVS, i got so into it that i kind of went "nooo, don't cut Mickies string!" haha.