Any kind of permanent, light-fast marker. I prefer Copic, Prismacolor, and Trias.

I use Prismacolor colored pencils.

I use a 2H pencil to sketch the drawing first.

I use a Copic fine line marker .005 to ink it in.

I use a kneaded eraser for big spaces, and my beloved electric eraser, which is actually battery-powered, for erasing details.

I use a big, fluffy brush to brush away eraser crumbs, and I always draw with a tissue under my hand to prevent oils from getting on the paper, which may cause the ink to bleed.

I use 3ply 100% acid-free illustration board, with a smooth plate finish so the markers don't bleed.

I also couldn't live without my electric pencil sharpener.

That's it! Have fun!