Airflo new micro braid sleeve is a super thin but very strong braid sleeve that forms a super smooth joint. It is available in a choice of Clear or fluorescent Orange, which acts as a bite indicator. When using braided backing, you may insert the fly line into the backing & use a piece of this braid sleeve to form a no-knot super smooth joint. It is also used for connecting braided loops to the tip of your fly line. Do not use glue on a braid sleeve joint. The joint works by the old chinese finger grip principle & is stronger than the line or leader. If you use glue, you may prevent the clinging of the braid to the line & hence weaken the joint.