Paper (might need to craft into a stack first using a 2x2 pattern) or leaves work. Or feathers.
Careful with the paper, no idea if it's still valid but I saw a bug report about using paper for fletching, and crashes.
To get leaves, go nuts on a tree with shears.
Careful with the paper, no idea if it's still valid but I saw a bug report about using paper for fletching, and crashes.
To get leaves, go nuts on a tree with shears.