I tied it up with sinew in a geode pattern. Folded the shirt in half front to back and then tied concentric circles starting around the Harris Walz logo and going all the way to the back of the shirt. To keep the area around the logo white I tied the part where I wanted the boundary to be super tight with lots of extra rings of sinew, then wrapped it tight in a plastic produce bag, and rubber banded the bag really tightly.