I still get a lot of questions on how to attach the hook to those flies tied only on a millimetre or two of x-small tubing. The answer is you don’t! The fly is sliding loose on the leader. The little silicon plastic tube is only to secure the knot in the correct position. This is a way to fish a super light delicate little fly in a very seductive way! Try Micro tubes and soft "Nobodys" and you will see what a great solution this is!